Question

10 people can paint a building in 5 days. If each person paints as quickly as the others then how much of the building could 7 people paint in 5 days?

Answer 1

7⁄10

Explanation:

You would divide 1⅖ by 2. You take the rate you need to find [1⅖ (or 7⁄5)], and divide it by the given rate in the exercise [2 (from 10⁄5)] to get 7⁄10.

Understood?

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Answer 2

The painting rate for 10 people is:

10/5

The painting rate for 7 people is:

7/5

Now use the rule of 3:

10/5 → 100%

7/5 → x

(7/5 * 100) / 10/5

140 / 10/5

140 / 2

70

Answer:

70% of the building can be painted by 7 men in 5 days.

Hope it helped,

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