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