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More Lessons for Arithmetic

Math Worksheets

To find the percentage of a number:

** Step 1** : Change the percent to a fraction

**Step 2 **: Multiply the fraction by the number

*Example: *

Evaluate 25% of 200

*Solution: *

25% of 200 =

= 50

* Example: *

There are 25 marbles in a bag. If 20% of the marbles are red, how many of them are red?

* Solution* :

Number of red marbles = 20% of 25

=

= 5

There are 5 red marbles in the bag.

Sometimes we may be given the percentage of a number and we are asked to find the number that represents the whole quantity. To find the whole quantity, we divide the given number by the given percentage.

* Example:*

If 25% of a number is 12, what is the number?

* Solution: *

Total quantity

*Example:*

Amy saves RM 240, which is 12% of her salary. What is her salary?

* Solution*

Salary

Her salary is RM 2,000

You can also find the percentage of a number by first changing the percent to a decimal

** Step 1** : Change the percent to a decimal

**Step 2 **: Multiply the decimal by the number

The following video will give examples of using decimals to find the percentage of a number

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