Find the percent of increase from 320 to 380. Round to the nearest tenth of a percent if necessary.

0.2%

18.8%

84.2%

15.8%

The percent of increase from 320 to 380 is 18.8%.

Calculation: (380-320)/320 = 60/320 ≈ 0.1875 ≈ 18.8%