Question

marie went surfing twice this week. yesterday, she spent 5.6 hours out riding waves. today she surfed for 2.7 hours. comparing yesterday to today, what is the percent of decrease in time that marie spent surfing? round your answer to the nearest tenth of a percent. % save answer

Explanation:

Step1: Find the decrease in time

Subtract today's time from yesterday's time: \( 5.6 - 2.7 = 2.9 \) hours.

Step2: Calculate the percent decrease

Use the formula for percent decrease: \( \text{Percent Decrease} = \frac{\text{Decrease}}{\text{Original Amount}} \times 100 \).
Here, the original amount is yesterday's time (\( 5.6 \) hours) and the decrease is \( 2.9 \) hours.
So, \( \text{Percent Decrease} = \frac{2.9}{5.6} \times 100 \approx 51.8\% \) (rounded to the nearest tenth of a percent).

Answer:

\( 51.8\% \)