Solutions by everydaycalculation.com
1st number: 4 1/5, 2nd number: 5/20
215 - 520 is 7920.
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Related: 42/5-5/20 21/5-10/20 21/10-5/20 21/5-5/40 63/5-5/20 21/5-15/20 21/15-5/20 21/5-5/60 21/5-25/20 21/25-5/20 21/5-35/20 21/35-5/20
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