Question

If Sarah reads at an average rate of 21 pages in four nights, how long will it take her to read 140 pages?

Answer 1

26 2/3 nights

Explanation:

You can use a proportion.

21 pages is to 4 nights as 140 pages is to x nights

21/4 = 140/x

21x = 4 * 140

3x = 4 * 20

3x = 80

x = 80/3 = 26 2/3