Solutions by everydaycalculation.com
1st number: 14/30, 2nd number: 4 1/12
1430 - 4912 is -21760.
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Related: 28/30-49/12 14/30-98/12 14/60-49/12 14/30-49/24 42/30-49/12 14/90-49/12 14/30-49/36 70/30-49/12 14/30-49/60 98/30-49/12 14/30-49/84
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