Henrico County Public Schools

There is one method you can use to solve both percent increase and percent decrease problems. Here you will learn more about the POWER of proportions.

The number of students enrolled at the J. R. Smith School has decreased from 800 students to 700 students. What is the percent decrease? |
Example 1: |

Last year the price of a Wonderful Whopper was $2.40. This year the price increased to $2.70. By what percent did the price increase? |
Example 2: |

## Proportional Percent Increase/Decrease Calculator |
## Percent Increase or Decrease ProblemsTo find the percent of increase or decrease remember that the proportion is always the following:The correct answers are provided so you can determine if you placed the numbers appropriately.
Original value = $12. (Answer 75%)
Original value = 96. (Answer 25%) |