Question

lena started to run on a treadmill after setting its timer for 51 minutes. the display says that she has finished 36% of her run. how many minutes have gone by? round your answer to the nearest tenth.

Explanation:

Step1: Convert percentage to decimal

To find 36% of 51 minutes, first convert 36% to a decimal by dividing by 100: \( 36\% = \frac{36}{100} = 0.36 \)

Step2: Multiply by total time

Multiply the decimal by the total time (51 minutes) to find the time elapsed: \( 0.36 \times 51 \)
Calculate \( 0.36 \times 51 = 18.36 \)

Step3: Round to nearest tenth

Round 18.36 to the nearest tenth. The hundredth digit is 6, which is greater than 5, so we round up the tenth digit: \( 18.36 \approx 18.4 \)

Answer:

18.4