Solutions by everydaycalculation.com
1st number: 1 5/10, 2nd number: 12/20
1510 - 1220 is 910.
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Related: 30/10-12/20 15/10-24/20 15/20-12/20 15/10-12/40 45/10-12/20 15/10-36/20 15/30-12/20 15/10-12/60 75/10-12/20 15/10-60/20 15/50-12/20 15/10-84/20 15/70-12/20
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