Rolf spent 15 hours last week practicing his saxophone. If #3/10# of the time was spent practicing warm-up routines, how much time did he spend practicing warm-up routines?

1 Answer
AbhilashGM
Mar 6, 2018

The answer is 4.5 hours (or 4 hours and 30 minutes).

Explanation:

If Rolf spent 3/10 of his time practicing warm-up routines, this means he spent 30% of his time on warm-up. So, the question becomes, what is 30% of 15 hours?

This can be calculated as:

#30/100 * 15 = 4.5#.

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