Solutions by everydaycalculation.com
1st number: 1 3/15, 2nd number: 1 12/15
1815 - 2715 is -35.
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Related: 36/15-27/15 18/15-54/15 18/30-27/15 18/15-27/30 54/15-27/15 18/15-81/15 18/45-27/15 18/15-27/45 90/15-27/15 18/75-27/15 18/15-27/75
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