The price of a gallon of unleaded gas was $2.81 yesterday. Today, the price rose to $2.87. Find the percentage increase. Round your answer to the nearest tenth of a percent.

Answer 1

Use "CHOO" (Change Over Original). In this case, change is $2.87- $2.81 = $0.06. Original (or "From") is the $2.81. 0.06/2.81 = 0.02135.... Mult by 100 to convert to pct (or hit "%" key on calculator) to get 2.135...%. Round to tenths (1 dec. place) Answer is an increase of 2.1%