Solutions by everydaycalculation.com
1st number: 1 2/10, 2nd number: 1 9/15
1210 - 2415 is -25.
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Related: 24/10-24/15 12/10-48/15 12/20-24/15 12/10-24/30 36/10-24/15 12/10-72/15 12/30-24/15 12/10-24/45 60/10-24/15 12/50-24/15 12/10-24/75 84/10-24/15 12/70-24/15
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