Solutions by everydaycalculation.com
1st number: 12/40, 2nd number: 2 18/40
1240 - 9840 is -4320.
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Related: 24/40-98/40 12/80-98/40 12/40-98/80 36/40-98/40 60/40-98/40 84/40-98/40
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