SOLUTION: Ralph spent 5/9 of an hour mixing paints and 7/9 of an hour painting. How much time in all did Ralph spend on his project?

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Question 7844: Ralph spent 5/9 of an hour mixing paints and 7/9 of an hour painting. How much time in all did Ralph spend on his project?
Answer by bonster(299) About Me  (Show Source):
You can put this solution on YOUR website!
5%2F9+7%2F9
=12%2F9
=1 3%2F9
=1 1%2F3

There are 60 minutes in an hour. Since we want to know what 1%2F3 of an hour is, divide 60 by 3:
%2860%29%281%2F3%29
=20 min
1 1%2F3= hour and 20 min

Ralph spends 1 hour and 20 minutes on his project.