In mathematics a percentage is a way of expressing a number as a fraction of 100.% is usually the symbol for the word percent. For example, 45 % is equal to 45 / 100, or 0.45. Percentages are used to express how large one quantity is relative to another quantity. The first quantity usually represents a part of, or a change in, the second quantity. For example, an increase of $ 0.15 on a price of $ 2.50 is an increase by a fraction of 0.15 / 2.50 = 0.06. Expressed as a percentage, this is therefore a 6 % increase.An example to find 75% of 40 is to first divide 40 by 100. 40 divided by 100 will equal 0.4. Then you times the number you get by the percent you want to find which is 75%. So, 75 x 0.4 = 30

Here is a quiz to take to see how much you know about percent:

1. 50% of 75?

A. 10

B. 20

C. 32.5

2. 50% of 100 is equal to...

A. 1/3

B. 1/2

C. 2/5

3. What is a percent?

A. A number out of 100

B. A number line

C. A way to find the area of a rectangle

4.If you have two dozen eggs and six of them break how much percent of them do you have left over?

A. 25%

B. 75%

C. 50%

5. 2/10 is equal the the percentage...

A. 25%

B.23%

C.20%

6. If you go to a clothing store and a $10 sweater is 25% off and then an additional 25% off how much will the sweater cost (round to the nearest penny)?

A. $5.30

B. $5.63

C. $5.50

If you got 1-6 right you need some practice at finding percents.

If you got 2-3 right you are okay at finding percents.

If you got 3-5 you are good at finding percents.

If you got 6-6 you are great at finding percents.

Sources:

www.graffiticreator.net

All my percent sheets I've made during the year