Solutions by everydaycalculation.com
1st number: 6/30, 2nd number: 1 12/30
630 - 4230 is -65.
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Related: 12/30-42/30 6/30-84/30 6/60-42/30 6/30-42/60 18/30-42/30 6/90-42/30 6/30-42/90 42/30-42/30
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