Solutions by everydaycalculation.com
1st number: 28/30, 2nd number: 1 19/30
2830 - 4930 is -710.
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Related: 56/30-49/30 28/30-98/30 28/60-49/30 28/30-49/60 84/30-49/30 28/90-49/30 28/30-49/90
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