Solutions by everydaycalculation.com
1st number: 3 0/15, 2nd number: 4 3/15
4515 - 6315 is -65.
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Related: 90/15-63/15 45/30-63/15 45/15-63/30 45/15-63/45 45/75-63/15 45/15-63/75
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