Solutions by everydaycalculation.com
1st number: 1 2/10, 2nd number: 4 1/12
1210 - 4912 is -17360.
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Related: 24/10-49/12 12/10-98/12 12/20-49/12 12/10-49/24 36/10-49/12 12/30-49/12 12/10-49/36 60/10-49/12 12/50-49/12 12/10-49/60 84/10-49/12 12/70-49/12 12/10-49/84
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