Solutions by everydaycalculation.com
1st number: 1 3/15, 2nd number: 8/12
1815 - 812 is 815.
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Related: 36/15-8/12 18/15-16/12 18/30-8/12 18/15-8/24 54/15-8/12 18/15-24/12 18/45-8/12 18/15-8/36 90/15-8/12 18/15-40/12 18/75-8/12 18/15-8/60 18/15-56/12 18/15-8/84
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