Question

Suppose Jamal swam the 100-meter butterfly race in 57.79 seconds. The next time he swam the same race, he swam it in 54.83 seconds. What percent decrease was there in his time? Round your answer to the nearest tenth of a percent.
Hint
5.1

Answer 1

That "hint" in your question is the answer, so? His swim time decreases by about 5.12%, which, rounded to the nearest tenth, is 5.1%.