Solutions by everydaycalculation.com
1st number: 2 5/20, 2nd number: 1 8/10
4520 - 1810 is 920.
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Related: 90/20-18/10 45/20-36/10 45/40-18/10 45/20-18/20 45/20-54/10 45/60-18/10 45/20-18/30 45/20-90/10 45/20-18/50 45/20-18/70
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