In this module, you can study how to calculate percent increase and percent decrease.
The video above shows a quick method for calculating percent increase or decrease. At the end, she quickly converts the decimal number answer to a percent by moving the decimal point two places to the right. If you're unclear how to do this, see "Converting decimals to percents" under the "Decimals" tab.
Use these search terms to find additional resources:
percent increase
percent decrease