Solutions by everydaycalculation.com
1st number: 12/30, 2nd number: 1 15/30
1230 - 4530 is -1110.
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Related: 24/30-45/30 12/30-90/30 12/60-45/30 12/30-45/60 36/30-45/30 12/90-45/30 12/30-45/90 60/30-45/30 84/30-45/30
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