Question

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 ?

Answer 2

@johnweldon1993 you think you can help ?

Answer 3

@welshfella

Answer 4

he paints 1/3 of the bedroom in 4/5 hours
so he will paint all of the bedroom in 3 times 4/5 hours