Solutions by everydaycalculation.com
1st number: 12/30, 2nd number: 1 6/30
1230 - 3630 is -45.
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Related: 24/30-36/30 12/30-72/30 12/60-36/30 12/30-36/60 36/30-36/30 12/90-36/30 12/30-36/90 60/30-36/30 84/30-36/30
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