Solutions by everydaycalculation.com
1st number: 16/20, 2nd number: 6 1/8
1620 - 498 is -21340.
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Related: 32/20-49/8 16/20-98/8 16/40-49/8 16/20-49/16 48/20-49/8 16/60-49/8 16/20-49/24 80/20-49/8 16/20-49/40 16/20-49/56
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