Seraphina is driving two hours to visit her family. For the first hour, she traveled at a speed of 60 miles per hour. Then, in the second hour, she traveled at a speed of 73 miles per hour. What is the percentage increase of Seraphina's speed? If necessary, round to the nearest tenth of a percent.

Question

Mathematics

Olive Blackburn

8 November, 02:57

Seraphina is driving two hours to visit her family. For the first hour, she traveled at a speed of 60 miles per hour. Then, in the second hour, she traveled at a speed of 73 miles per hour. What is the percentage increase of Seraphina's speed? If necessary, round to the nearest tenth of a percent.

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Nicolas Turner · Answer 1

percent change = (amount of change) / (original amount) * 100%

... = (73 - 60) / 60 * 100%

... = 13/60 * 100%

... ≈ 0.216667 * 100%

... ≈ 21.7%

Sarah's speed in the second hour was about 21.7% greater than in the first hour.