Question

David exercises every day. He spends 40% of his exercise time on the treadmill. If he uses the treadmill 40 minutes each day, how many minutes does he exercise each day?

Answer 1

David spends 100 minutes exercising everyday. We can make a proportion here, and it is very easy. 40%/100% = 40 minutes/ x minutes. Because the two sides have the sane numerator, they must also have the same denominator to be equal.

Answer 2

David exercises 100 minutes each day.

Explanation:

1. Let's review the information given to us to answer the question correctly:

David uses the treadmill 40 minutes each day = 40% of his exercise time

2. How many minutes does David exercise each day?

Let's use the Direct Rule of Three to answer this question:

Minutes Percentage

40 40

x 100

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40 * x = 40 * 100

40x = 4,000

x = 4,000/40

x = 100

David exercises 100 minutes each day.