Solutions by everydaycalculation.com
1st number: 16/30, 2nd number: 2 24/30
1630 - 8430 is -3415.
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Related: 32/30-84/30 16/60-84/30 16/30-84/60 48/30-84/30 16/90-84/30 16/30-84/90 80/30-84/30
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