Question

At Cheng's Bike Rentals, it cost $22 to rent a bike for 5 hours.How many hours of bike use does a customer get per dollar?

Answer 1

they give you a ratio of
\[\frac{$22}{5 \text{ hours} }\]

they want to find the ratio
\[\frac{\text{ hours}} {$1}\]

so the first thing to do is flip the ratio they gave you, so you have hours per dollars
\[\frac{5 \text{ hours} }{$22}\]
now divide top and bottom by 22 to make the denominator 1
what do you get for the top?

Answer 2

0.227?

Answer 3

yes, you get 5/22 or about 0.227 hours
of course nobody talks about 0.227 hours (though that is the answer here):
0.227 hours per dollar is the answer

but in minutes, 60*0.227 = 13.6 minutes
13 and 1/2 minutes per dollar sounds more "normal"