Question

fan&medalll







Marcus painted one-third of his bedroom in fourth-fifths of an hour. At this rate, how long would it take him the paint the entire room?

five-twelfths of an hour

twelve-fifths of an hour

fifteen-fourths of an hour

four-fifteenths of an hour

Answer 1

you could do this as a proportion
1/3 : 4/5 :: 1 : x

or you could use the idea of
rate * time = 1 job

rate is amount painted per hour

Which way to you want to try to do this ?