Subtract to find the amount of change.

New measurement original measurement

243 257 \ \

= 14               (Subtract: 243 257 = 14)

Write a ratio that compares the amount of change to the original amount.Express the ratio as a percent.

Percent change = .

     (Divide: )

Write decimal as percent.

Multiply by 100 and add .

       (Multiply: )

The percent of change is about .In this case, the percent of change is a percent of decrease.