Solutions by everydaycalculation.com
1st number: 1 6/15, 2nd number: 6/15
2115 - 615 is 11.
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Related: 42/15-6/15 21/15-12/15 21/30-6/15 21/15-6/30 63/15-6/15 21/15-18/15 21/45-6/15 21/15-6/45 21/15-30/15 21/75-6/15 21/15-6/75 21/15-42/15
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