Solutions by everydaycalculation.com
1st number: 1 8/20, 2nd number: 1 4/20
2820 - 2420 is 15.
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Related: 56/20-24/20 28/20-48/20 28/40-24/20 28/20-24/40 84/20-24/20 28/20-72/20 28/60-24/20 28/20-24/60
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