Question

Dereck applies grass seed to 2/5 acre in 3/4 hour. how many acres can derek cover per hour?

Answer 1

We can use a proportion to solve this problem

2/5 acre ---- 3/4 h

x acre --------1 h

x= ((2/5)*1) / (3/4)= (2/5) *(4/3) = 8/15 acre

Answer 2

Find the unit rate: divide the area by the time. Optionally: convert the given fractions into decimal fractions to speed things up:

0.4 acre

--------------- = 0.5333.... acre/hour, or 8/15 acre/hour.

0.75 hour