Solutions by everydaycalculation.com
1st number: 18/30, 2nd number: 2 15/30
1830 - 7530 is -1910.
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Related: 36/30-75/30 18/60-75/30 18/30-75/60 54/30-75/30 18/90-75/30 18/30-75/90 90/30-75/30
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