Solutions by everydaycalculation.com
1st number: 12/30, 2nd number: 1 18/30
1230 - 4830 is -65.
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Related: 24/30-48/30 12/30-96/30 12/60-48/30 12/30-48/60 36/30-48/30 12/90-48/30 12/30-48/90 60/30-48/30 84/30-48/30
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