Divide 7 minutes into 60 minutes?

You start them both at the same time. When the 5 minute timer ends, you restart the 5 minute timer and stop it when the 7 minute timer finishes (leaving 3 minutes). You reset the 5 minute timer, let...

20%

36 / 60 = 0.6 = 60 %

Because the units(minutes) for both 45 and 60 are the same, you can simply place 45 over 60 ~ 45min/60min = 3/4 (As the minutes cancel)