Solutions by everydaycalculation.com
1st number: 1 6/15, 2nd number: 12/15
2115 - 1215 is 35.
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Related: 42/15-12/15 21/15-24/15 21/30-12/15 21/15-12/30 63/15-12/15 21/15-36/15 21/45-12/15 21/15-12/45 21/15-60/15 21/75-12/15 21/15-12/75 21/15-84/15
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