Can You Subtract 7 4/5, 18 6/15 And Reduce Your Answer To Lowest Terms?

7 4/5 - 18 6/15 = 7 4/5 - 18 2/5
  = (5*7 +4)/5 - (5*18 +2)/5
  = 39/15 - 92/5
  = (39 -92)/5
  = -53/5
  = -10 3/5
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If you meant 18 6/15 - 7 4/5, the math is the same but the numbers are swapped and the ending sign is positive instead of negative.