Solutions by everydaycalculation.com
1st number: 21/30, 2nd number: 2 15/30
2130 - 7530 is -95.
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Related: 42/30-75/30 21/60-75/30 21/30-75/60 63/30-75/30 21/90-75/30 21/30-75/90
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