Solutions by everydaycalculation.com
1st number: 1 2/10, 2nd number: 3/12
1210 - 312 is 1920.
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Related: 24/10-3/12 12/10-6/12 12/20-3/12 12/10-3/24 36/10-3/12 12/10-9/12 12/30-3/12 12/10-3/36 60/10-3/12 12/10-15/12 12/50-3/12 12/10-3/60 84/10-3/12 12/10-21/12 12/70-3/12 12/10-3/84
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