# How to calculate percentages easily

In mathematics, a percentage is a number or ratio expressed as a fraction of 100.

## Example and Solution

Percent means per 100 so your should devided by 100. So 50% means half (^{50}⁄_{100}), 100% means all (^{100}⁄_{100}). These are example and how to calculating percentage.

### How to calculate percentage of a number example

Example : 20% of 250 oranges are bad. How many orangess are bad?

- 20% =
^{20}⁄_{100} - 20% of 250 oranges =
^{20}⁄_{100}x 250 - 20% of 250 oranges =
^{5000}⁄_{100} - So answer is
**50**oranges are bad

### How to calculate percentage of one number to another example

Example : If only 25 of the 250 apples are bad, what percent is that?

- As a fraction :
^{25}⁄_{250}= 0.10 - As a percentage :
^{25}⁄_{250}x 100 = 10% - So answer is
**10%**of oranges are bad

### How to calculate a value from the percentage part example

Example : the sale price of a smartphone normally priced at $320 that has been reduced by 20%.

- Find 20% of $320 :
^{20}⁄_{100}x $320 = $64 - Sale price of smartphone is
**$320 - $64 = $256**

**Another way is :**

- 100% (full price) - 20% (discount) =
**80%**(discounted price) - Then multiplied by the original price :
**0.80 x 320 = 256**