Solutions by everydaycalculation.com
1st number: 1/20, 2nd number: 2 10/15
120 - 4015 is -15760.
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Related: 2/20-40/15 1/20-80/15 1/40-40/15 1/20-40/30 3/20-40/15 1/60-40/15 1/20-40/45 5/20-40/15 1/20-40/75 7/20-40/15
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