# A sofa regularly sells for $790. The sale price is $624.10. How do you find the percent decrease of the sale price from the regular price?

##### 2 Answers

#### Explanation:

To calculate the percent change in any situation:

increase, decrease, profit, mark-up, discount, loss, growth, decline, etc..

Use the method:

The price of the sofa changed from

This is an amount of

=

There was a -21% change or a 21% decrease of the sale price from the regular price.

#### Explanation:

The formula for calculating the percentage change of something is

In this problem we are provided the old value of $790 and the new value of $624.10 which we can substitute into the formula to calculate the percentage change: