Solutions by everydaycalculation.com
1st number: 16/20, 2nd number: 2 5/20
1620 - 4520 is -2920.
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Related: 32/20-45/20 16/20-90/20 16/40-45/20 16/20-45/40 48/20-45/20 16/60-45/20 16/20-45/60 80/20-45/20
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