Solutions by everydaycalculation.com
1st number: 1 6/30, 2nd number: 1 15/30
3630 - 4530 is -310.
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Related: 72/30-45/30 36/30-90/30 36/60-45/30 36/30-45/60 36/90-45/30 36/30-45/90
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