SOLUTION: a chemist has 31/40 fluid oz. of solution and she needs 3/8 fluid oz. of solution how much will remain?

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Question 839938: a chemist has 31/40 fluid oz. of solution and she needs 3/8 fluid oz. of solution how much will remain?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
31/40-3/8=
31/40-15/40=16/40=2/5