Solutions by everydaycalculation.com
1st number: 2 5/15, 2nd number: 4 1/5
3515 - 215 is -2815.
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Related: 70/15-21/5 35/15-42/5 35/30-21/5 35/15-21/10 35/15-63/5 35/45-21/5 35/15-21/15 35/75-21/5 35/15-21/25 35/15-21/35
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