Solutions by everydaycalculation.com
1st number: 3/20, 2nd number: 13 1/3
320 - 403 is -79160.
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Related: 6/20-40/3 3/20-80/3 3/40-40/3 3/20-40/6 9/20-40/3 3/60-40/3 3/20-40/9 15/20-40/3 3/20-40/15 21/20-40/3 3/20-40/21
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