Solutions by everydaycalculation.com
1st number: 21/30, 2nd number: 2 3/30
2130 - 6330 is -75.
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Related: 42/30-63/30 21/60-63/30 21/30-63/60 63/30-63/30 21/90-63/30 21/30-63/90
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