Solutions by everydaycalculation.com
1st number: 2 5/20, 2nd number: 2 1/10
4520 - 2110 is 320.
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Related: 90/20-21/10 45/20-42/10 45/40-21/10 45/20-21/20 45/20-63/10 45/60-21/10 45/20-21/30 45/20-21/50 45/20-21/70
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