Subtract 7 4/5 From 18 6/15 Reduce To Lowest Terms?

First, find a common denominator for 5 and 15:

• 5, 10, 15
• 15

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Now, subtract:

18 and 6/15 - 7 and 12/15 must be changed, borrow one from 18:

• 17 and 21/15 - 7 and 12/15 = 10 and 9/15 --> 10 and 3/5