Solutions by everydaycalculation.com
1st number: 2 5/20, 2nd number: 2 4/10
4520 - 2410 is -320.
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Related: 90/20-24/10 45/20-48/10 45/40-24/10 45/20-24/20 45/20-72/10 45/60-24/10 45/20-24/30 45/20-24/50 45/20-24/70
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