Solutions by everydaycalculation.com
1st number: 16/20, 2nd number: 1 8/20
1620 - 2820 is -35.
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Related: 32/20-28/20 16/20-56/20 16/40-28/20 16/20-28/40 48/20-28/20 16/20-84/20 16/60-28/20 16/20-28/60 80/20-28/20
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