Solutions by everydaycalculation.com
1st number: 1 2/10, 2nd number: 9/12
1210 - 912 is 920.
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Related: 24/10-9/12 12/10-18/12 12/20-9/12 12/10-9/24 36/10-9/12 12/10-27/12 12/30-9/12 12/10-9/36 60/10-9/12 12/10-45/12 12/50-9/12 12/10-9/60 84/10-9/12 12/10-63/12 12/70-9/12 12/10-9/84
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