Yael worked out at a gym for 3 hours. Her workout consisted of stretching for 21 minutes, jogging for 39 minutes, and lifting weights for the remaining amount of
time. What percentage of Yael's workout was spent lifting weights?

21 + 39 = 60 minutes ( 1 hour)

So for the remaining time she lifted weights for about 2 hours.

3 hours = 180 minutes

180 - 60 = 120

About 66% of the remaining time Yael used to lift weights.

To be accurate 66.6% ( the last 6 repeating a infinite amount of time aka it doesnt end)

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5