Solutions by everydaycalculation.com
1st number: 5/20, 2nd number: 8 4/10
520 - 8410 is -16320.
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Related: 10/20-84/10 5/40-84/10 5/20-84/20 15/20-84/10 5/60-84/10 5/20-84/30 25/20-84/10 5/20-84/50 35/20-84/10 5/20-84/70
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