Joe reads 5 pages every 8 minutes. Lulu reads 10 pages every 13 minutes. Compare their ratios to determine who reads faster.

Answer 1

5/8 10/13

cross multiply 80>65

10 is the larger denominator and part of 8x10, so 10/13 > 5/8

or convert both to the same denominator

5(13)/8(13) 10(8)/8(13) 5(13) = 65 < 80, 5/8 < 10/13

or use a calculator 5/8 = 0.625, 10/13 = .769 > 0.625

Lulu reads faster