Solutions by everydaycalculation.com
1st number: 15/20, 2nd number: 4 8/10
1520 - 4810 is -8120.
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Related: 30/20-48/10 15/20-96/10 15/40-48/10 15/20-48/20 45/20-48/10 15/60-48/10 15/20-48/30 75/20-48/10 15/20-48/50 15/20-48/70
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