Solutions by everydaycalculation.com
1st number: 18/20, 2nd number: 1 5/16
1820 - 2116 is -3380.
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Related: 36/20-21/16 18/20-42/16 18/40-21/16 18/20-21/32 54/20-21/16 18/20-63/16 18/60-21/16 18/20-21/48 90/20-21/16 18/20-21/80
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