Question

Seraphina is driving two hours to visit her family. For the first hour, she traveled at a speed of 59 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

The jump from 59 mph to 72 mph is (72-59) mph, or 13 mph.

13 mph
---------- * 100% = 22.0% is the percentage increase in her speed.
59 mph