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1 vote
Angela painted 3/8 of the room and Todd painted 2/5 of the same room how much of the room is left to paint?

User Dmercredi
by
8.4k points

2 Answers

5 votes
Start by getting the fractions to have the same denominator by finding the Least Common Multiple of 5 and 8

LCM of 5 and 8 is 40

write the fractions in those terms:

3/8 = 15/40
2/5 = 16/40

add them together to get the total space painted:

15/40 + 16/40 = 31/40

The entire room space is 1, so the room still left to paint is:
1- 31/40 = 9/40
User Fizer Khan
by
8.5k points
4 votes
31/40. Cannot be simplified
User Nathan Crause
by
8.2k points
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