## Wednesday, December 13, 2006

### Boeun's Percentage Growing Post

Question 1:

What is a good definition of percent? You should use words symbols, pictures and numerical examples in your definition.

I made a mind map from Gliffy.

Example Questions:

If I got 29 out of 40 and Mr. Harbeck got 30 out of 50, who got more right on the tests that Mr. Harbeck and I took??

For this kinds of questions, it's easier to deal with percents. To get percents, you have to divide Numerator by Denominator, or you have to fix those fractions' denominator to 10, 100, 1000, or you might have to make it into 10000. It just hurts Mr. Harbeck's and my brain too much. Anyways, I'll show you how to get percent.

I used Bubbleshare for showing how to solve.

BubbleShare

Question 2
How are three fifths (3/5), 3:2, 60% and 0.6 all the same? Use pictures and words to show your answer.

I used bubbleshare for this question too.

Many people and I thought that I should put some explanations.

Here are my explanations,

I think 3/5, 3:2, 60% and 3/5, 3:2, 60% a d 0.6 are the same, because when I convert them to a percent, it gives me 60% equaly.

For 3/5, if you do 3 divide by 5, gives me 0.6, and if I multiply 0.6 by 100, it gives me 60%.

Next, 3:2, to get the percent of this ratio, first, I have to convert this to a fraction. To convert this to a fraction, I have to know the top, which is the numerator. The numerator would be 3.
To get the bottom, the denominator, I have to add 3 and 2 together because 3 and 2 are the parts of the whole thing. This gives me 3/5. Now I have to get the percentage, so i'm dividing 3 by 5, which is 0.6. Finally, I have to multiply 10 by 0.6 = 60%.

The 60% is samething. It means that I don't have to do any work for this!

For 0.6 to be 60%, I have to multiply 0.6 by 10, which gives me 60% again!!

So, my final answer is that 3/5, 3:2, 60% and 0.6 are the SAME!!!

3/5 = 3:2 = 60% = 0.6

BubbleShare

Question 3
Show 3 different ways to find 35% of 80.

For this question, I also used bubbleshare. It is really easy to work with.

I also thought this question needs some explanations too.

First, I found 1% and multiplied the answer by 35, because 1% is only one square if you colour in the grid. So i multiplied it by 35 so my answer can be right. My answer is 0.85 x 35 = 29. 75

Second, I found 10% and found 5% also, because 10% x 3 equals 30%, and 10% x 4 equals 40%.
What I did was that I found 10% from dividing 10 from 100%. That gave me 10% and I multiplied 10% by 3.
The next step I took was that I divided 10% by 2, so that it will give me the 5%. After that, I added 30% and 5%, which was my final answer.

Last, I found 5% to get 35%, because I can just go and multiply 7.
To get 5% from 100%, you have to divide it by 20. This gave me 4.25. After that, I multiplied it by 7, and the answer was 29.25, which was the same answer as the other two at the top.

BubbleShare

Question 4

I left a comment at here:
http://linden8m.blogspot.com/
He or she explained how to get percent and gave us some examples, but I don't think that will make people to understand quickly. So i left a comment that he/she might want to put some example questions and solve the questions step by step, with some explanations between.

I also went to another one. This is,
http://linden8z.blogspot.com/
He/she explained very well, but it was boring to me. I thought if they could put some colours and pictures at the top, not at the bottom, that might get attentions from people.

For this one, I found one example that is real simply explained.

ex. 1. 75% of 40= 30We know this because 75% is really 75/100. Now we divide 75 into 100. That will give us 0.75. Now multiply 0.75 by 40. That gives us 30.

Question 5
The principal announced that 50% of the children in Ms. Stanzi's class met their reading goal for the month and that 55% of the children in Ms Lowrey's class met their reading goal for the month. Ms Stanzi said that a greater number of her students met their reading goal. Could Ms Stanzi be correct? Why or Why not.

I think Ms. Stanzi could be right, because the question didn't tell us how many people were in each classes. For example, what if Ms. Stanzi had 40 students in her class and Ms. Lowrey has 20 students?

Again, I used bubbleshare for this question too.

BubbleShare

My explanations:

For the percents, Ms. Stanzie and Ms. Lowrey, but after finding how many students that Ms. Stanzie had for 50% and Ms. Lowrey, Ms. Stanzie had more students than Ms. Lowrey. So, my final answer is YES, Ms. Stanzie could be right by having more students than Ms. Lowrey.

Question 6
Use a hundred grid (unit square) to illustrate the following questions. Once you have explained and illustrated what the question means solve it.

a) 16 is 40% of what number?

I think the question means
'a mistary number's 40% is 16. What is that mistary number?'
To solve this kind of question, you have to know what is the 10% of this whole number. if the 40% of a mistary number is 16, than you can divide it by 4, and it will give you 10% of that mistary number. So multiply it my 10, than it will give you 100%, which is that mistary number! I'll show you how to get that step by step, with question b. (BUBBLESHARE)

b) What is 120% of 30?

I think the question means
' 100% is 30. What number is 120%?'
To solve this kind of question, you have to know what the 5%,10%,20%,30%....and so on, but it just hurts my brain too much to find it with 30% or any number that is not 20%. I can do it as 10%, but it's just too much works. So, my way to solve this problem is that i will divide 100% by 5, so it will give me 20%, and i'll multiply 20% by 6, because if i multiply 20% by 5, it gives me 100% and I want 120%! I'll show you how to get that step by step, with question a. (BUBBLESHARE)

BubbleShare

This is end of my first growing post.

I'M MARKING Andrea's Percentage Growing Post =)
SP8-17 (2006) MATH BLOG: Andrea's Percentage Growing Post =)

I ALSO MARKED Amalia's Growing Post
SP8-17 (2006) MATH BLOG: Amalia's Growing Post

Andrea =) said...

Hey. I love ur growing post, really!.. Great choice of colors. ! And I think you explain it really well. .. I bet you'll be included @ the Hall Of Fame. lol. :D two-thumbs up!

boeun said...

Thank you Andrea for great comment. I will check your Growing Post if you are done! =P

Andrea =) said...
This comment has been removed by the author.
Katira_M said...

Setup
5/5
Comments: Well done on the gliffy and bubbleshare.
Question 1
10/10
Comments: Nice way of explaining percentages. It was easy to understand and you used both gliffy and bubbleshare.
Question 2
8/10
Comments: I'm suggesting that you should explain your thoughts with words so that people could understand fully of what you have in mind.
Question 3
6/10
Comments: Like before, you should explain your thoughts with words. Also, you should probably use diagrams or pictures to further enhance your strategies.
Question 4
4/5
Comments: I suggest that you should include one of the problems they solved, and a diagram.
Question 5
10/10
Question 6
15/15
Comments: Excellent work! I could really tell that you spent extra time answering this question.
Overall Mark
58/65
Overall Comment for the Growing Post: Excellent work! You've done a very good job on answering the questions.

Andrea =) said...

Setup
5/5
Comments: You have the right title & a good choice of colours (for the nth time!)
Question 1
10/10
Comments: I really really like your way of explaining here. I loved your idea of the 'Boeun & Mr. Harbeck thing'. I think it's pretty smart.
Question 2
8/10
Comments: It's good that you thought of using Bubbleshare to help you but I really think that you should also try to explain what's on your mind in words to make a full thought.
Question 3
8/10
Comments: Just like what I said earlier, you should also explain in words.
Question 4
4/5
Comments: I suggest that you should include one of the problems they solved, and a diagram and enhance the thought by explaining further.
Question 5
9/10
Comments: I like the way you used Bubbleshare and I saw the extra effort.
Question 6
15/15
Comments: I gave u a 15 out of 15 because I think you really did explain this well, good use of bubbleshare and showed extra effort.

Overall Mark
59/65
Overall Comment for the Growing Post: Great! I really think you did a good job though I hope you could improve in some point. But keep up the good work!!! Just don't forget to explain in words, not just in Bubbleshare... The extra effort on the almost last part of this growing post is greatly appreciated. =P