James C's Growing Post*

*work in progress

PERCENTAGE:

Question 1

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

Here is a good definition of percentage:

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.

3/5, 3:2, 60%, and 0.6 are all the same because they are all equivalents.

Ratio: Keep the numerator as pt. 1, and subtract the numerator from the denominator for pt. 2:3:(5-3=)2

Percentage: Divide numerator by the denominator, then multiply by 100:
3/5=0.6
0.6 x 100 = 60%

Decimal: You take your percentage, then divide it by 100:60% / 100 = 0.6

Question 3

Show 3 different ways to find 35% of 80.

Way 1:
Divide 80 by 100, which gives you 0.8.
Then multiply 0.8 by the desired percentage, 35.
It gives you an answer of 28, so 28 is 35% of 80.

Way 2:
Take your total, 100%, and divide it by 80. It gives you 1%, 0.8.
Multiply 0.8 by the desired percentage, 35.
You get 28, which is 35% of 80.

Way 3:
The fraction 28/80 is equal to the fraction 35/100.
28 divided by 80 = 0.35
35 divided by 100 = 0.35

Question 4

Find a link to blogs that deal with percentages. Leave a comment behind and add the link with a review.

http://linden8z.blogspot.com/2006/11/percentages-real-deal.html

This was a very good post. It basically taught everything about percentage, such as what the word "percentage" means, how to reduce a percentage.
I recommend that anyone who is looking for information on percentage for the first time should check out this post. It's very easy to follow, and contains a lot of information.

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.

The answer to this question depends on how many students are in each class. It would be true if both classes had the same number of students, however if Ms Stanzi had 35 students in her class, and Ms Lowrey had 30, it would be false:

Ms. Stanzi
50% / 100 = 0.5
0.5 x 35 = 17.5

Ms. Lowrey
55% / 100 = 0.55
0.55 x 30 = 16.5


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?

• 40% of 100 = 40
• 40 / 100 = 0.4
• 16 x 0.4 = 40
• 40 / 100 = 16/40

You divide 40 by 100, getting 0.4. Then multiply 0.4 by 16, the starting number.

B. What is 120% of 30?

120% of 100 = 120

120 / 100 = 1.2

30 x 1.2 = 36

120/100 = 36/30

You compute 120% of 100 first, 120. Divide 120 / 100, answer is 1.2. Then multiply 1.2 by the whole number, 30. It gives you a final answer of 30/36.

Kim's Percentage Growing Post

~~Completed and is already marked by 2 people~~

Question 1
What is a good definition of percent? You should use words symbols, pictures and numerical examples in your definition.

Percent is an equivalent that is written as a fraction that is out of a hundred (100). It represents as a part of a number generally out of 100. It has a percent sign (%), a fraction or ratio with a denominator of 100 and the word "cent" means 100 in French. For example:


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.

Three fifths, 3/5, 3:2, 60% and o.6 are all the same because they are all equivalent to each other, they are just written in a different form. Example:


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


Question 4
Find a link to blogs that deal with percentages. Leave a comment behind and add the link with a review (What the post was talking about....yes you have to read the post and why others should read the post)

This post was EXCELLENT. He gave examples and pictures to help understand the process of getting a percentage. His pictures showed that you can actually have a percentage that is more than 100%. He showed that if you get an A+ and if you give out more of 100% of your best, those were examples of the possibilities of getting more than 100%. I also learned something from his post. Did you know that the word "of" actually means multiply in the "math language"? Well I didn't, so that was a little something I learned. His post was really understandable and if someone had trouble with percentage, you should check out his post... click here please to see it !

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 that Ms Stanzi can be correct because the question did not mention how many students Ms Stanzi and Ms Lowrey has. So it is important to know the amount of students that are in their class. If the amount of students are not included, (like this question) then the answer depends on your explanation. For example, if Ms Stanzi has about 40 students, 50% of it would be 20 students passing their reading goal. If Ms Lowrey has 20 students, 55% of it would be 11 students passing their reading goal. BUT! If Ms Stanzi and Ms Lowrey has the same amount of students in their class, then Ms Stanzi will be wrong. For example, if they both have 20 students in their class, 50% of it would be 10, and 55% of it would be 11, so Ms Lowrey would have the most students that passed their reading goal.





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?
b) What is 120% of 30?

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Question 7: I have already marked Angelic's Growing Post and Sarika's Growing Post. I also already have two people who have marked my own Growing Post.

K.V. 8-41

Edits and extras that I have made to my growing post:
1. I marked Lisa's growing post (because Mr.H said that we should mark the ones that have not been marked yet).
2. I added a little more details on the pictures in the post that I have commented.