Solutions by everydaycalculation.com
1st number: 12/18, 2nd number: 3 6/18
1218 - 6018 is -83.
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Related: 24/18-60/18 12/36-60/18 12/18-60/36 36/18-60/18 12/54-60/18 12/18-60/54 60/18-60/18 12/90-60/18 12/18-60/90 84/18-60/18
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