Solutions by everydaycalculation.com
1st number: 4 2/10, 2nd number: 5/20
4210 - 520 is 7920.
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Related: 84/10-5/20 42/10-10/20 42/20-5/20 42/10-5/40 42/10-15/20 42/30-5/20 42/10-5/60 42/10-25/20 42/50-5/20 42/10-35/20 42/70-5/20
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