Solutions by everydaycalculation.com
1st number: 3/20, 2nd number: 2 8/12
320 - 3212 is -15160.
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Related: 6/20-32/12 3/20-64/12 3/40-32/12 3/20-32/24 9/20-32/12 3/20-96/12 3/60-32/12 3/20-32/36 15/20-32/12 3/20-32/60 21/20-32/12 3/20-32/84
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