Solutions by everydaycalculation.com
1st number: 6/20, 2nd number: 2 5/20
620 - 4520 is -3920.
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Related: 12/20-45/20 6/20-90/20 6/40-45/20 6/20-45/40 18/20-45/20 6/60-45/20 6/20-45/60 30/20-45/20 42/20-45/20
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