Question

Scott took 4 2/5 hours to clean the bathroom. He took 2 1/4 hours to clean the den. How much longer did it take Scott to clean the bathroom?

Answer 1

Find the difference between the two times

= 4 2/5 - 2 1/4
convert each mixed number to an improper fraction

= 22/5 - 9/4
change to common denominator (20)

= 88/20 - 45/20
subtract numerators only

= 43/20
change back to mixed number

= 2 3/20


ANSWER: It took 2 3/20 hours longer to clean the bathroom.

Hope this helps! :)