Elsa reads 2/5 chapters in 7/8 hours. What is the unit rate in chapters per hour?

Question

Elsa reads 2/5 chapters in 7/8 hours. What is the unit rate in chapters per hour?

Answer 1

Since Elsa is reading at a constant rate and starting at 0 chapters in 0 hours, she has a proportional relationship. Meaning you can set up a proportion and solve from there.

(2/5) / (7/8) = x chapter / 1

x*(7/8) = (2/5)*1

(7/8)x = (2/5)

x = (2/5)/(7/8)

x = 16/35 chapter/hour