Solutions by everydaycalculation.com
1st number: 1 6/30, 2nd number: 1 18/30
3630 - 4830 is -25.
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Related: 72/30-48/30 36/30-96/30 36/60-48/30 36/30-48/60 36/90-48/30 36/30-48/90
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