# How do you calculate the percent change of Sales for 2007 $404,729 to Sales for 2008 $571,320?

##### 1 Answer

Sep 16, 2016

There are basically two ways to go about this:

#### Explanation:

Take the difference New minus Old, divide this by Old, and multiply by 100 to get the percentage:

**Or:**

Use ratio's. Set Sales 2007 to 100%, and get the number for 2008:

Cross-multiply:

which is a