Percent of Change PRE-ALGEBRA LESSON Write these fractions to the nearest tenth of a percent. a. b %80.8%

Percent of Change PRE-ALGEBRA LESSON The __________________ is the percent a quantity Increases or decreases from its original amount Vocabulary

Find the percent of increase from 8 to 9.6. Percent of Change PRE-ALGEBRA LESSON 6-8 amount of increase = 9.6 – 8 = 1.6 = 0.2 = 20% The percent of increase from 8 to 9.6 is 20%. percent of increase = amount of increase original amount = Quick Check 6-8

In a given year, Hillsboro had a total of 7.5 in. of rain by March 1 and a total of 22.5 in. by July 1. Find the percent of increase from 7.5 to Percent of Change PRE-ALGEBRA LESSON 6-8 amount of increase = 22.5 – 7.5 = 15 = 2 = 200% The percent of increase from March 1 to July 1 was 200%. percent of increase = amount of increase original amount = Quick Check 6-8

Find the percent of decrease from 1,250 to 1,120. Percent of Change PRE-ALGEBRA LESSON 6-8 amount of decrease = 1,250 – 1,120 = 130 = = 10.4% percent of decrease = amount of decrease original amount = 130 1,250 Quick Check 6-8

Percent of Change PRE-ALGEBRA LESSON 6-8 Solve. 1.Find the percent of increase from 22 to Find the percent of decrease from 6.3 to A surgeon performed 62 operations in He performed 342 in Find the percent of increase % 451.6% 65.1% 6-8