Final answer:
Sam has run for approximately 58.3 minutes, which is calculated by multiplying the total time of 87 minutes by the completed percentage of 67% and then rounding to the nearest tenth.
Step-by-step explanation:
The student is asking how many minutes have gone by if Sam has completed 67% of his 87-minute run on the treadmill. To solve this, we will calculate the time elapsed using the given percentage and the total time.
The formula to calculate this is:
Elapsed time = Total time × Percentage completed / 100
So, when we apply the values:
Elapsed time = 87 minutes × 67% / 100
Elapsed time = 58.29 minutes
When we round the elapsed time to the nearest tenth:
Elapsed time = 58.3 minutes
This means that Sam has been running for approximately 58.3 minutes on the treadmill.