Solutions by everydaycalculation.com
1st number: 12/40, 2nd number: 1 20/40
1240 - 6040 is -65.
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Related: 24/40-60/40 12/80-60/40 12/40-60/80 36/40-60/40 60/40-60/40 84/40-60/40
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