Question

Sara is driving two hours to visit her family. For the first hour, she traveled at a speed of 58 miles per hour. Then, in the second hour, she traveled at a speed of 72 miles per hour. What is the percentage increase of Seraphina's speed? If necessary, round to the nearest tenth of a percent.

Answer 1

percentage increase = \frac{increase}{original} × 100%

increase = old - new = 72 - 58 = 14 miles

original = 58 miles

percentage increase = 14/58 x 100 = 24.13% ⇒ 24.1% to nearest tenth