Solutions by everydaycalculation.com
1st number: 27/30, 2nd number: 1 15/30
2730 - 4530 is -35.
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Related: 54/30-45/30 27/30-90/30 27/60-45/30 27/30-45/60 81/30-45/30 27/90-45/30 27/30-45/90
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