Solutions by everydaycalculation.com
1st number: 1/20, 2nd number: 2 0/20
120 - 4020 is -3920.
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Related: 2/20-40/20 1/20-80/20 1/40-40/20 3/20-40/20 1/60-40/20 1/20-40/60 5/20-40/20 7/20-40/20
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