Solutions by everydaycalculation.com
1st number: 1 5/15, 2nd number: 1 9/15
2015 - 2415 is -415.
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Related: 40/15-24/15 20/15-48/15 20/30-24/15 20/15-24/30 60/15-24/15 20/15-72/15 20/45-24/15 20/15-24/45 20/75-24/15 20/15-24/75
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