Solutions by everydaycalculation.com
1st number: 1/20, 2nd number: 2 1/10
120 - 2110 is -4120.
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Related: 2/20-21/10 1/20-42/10 1/40-21/10 1/20-21/20 3/20-21/10 1/20-63/10 1/60-21/10 1/20-21/30 5/20-21/10 1/20-21/50 7/20-21/10 1/20-21/70
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