Solutions by everydaycalculation.com
1st number: 12/30, 2nd number: 2 15/30
1230 - 7530 is -2110.
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Related: 24/30-75/30 12/60-75/30 12/30-75/60 36/30-75/30 12/90-75/30 12/30-75/90 60/30-75/30 84/30-75/30
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