Solutions by everydaycalculation.com
1st number: 12/18, 2nd number: 2 6/18
1218 - 4218 is -53.
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Related: 24/18-42/18 12/18-84/18 12/36-42/18 12/18-42/36 36/18-42/18 12/54-42/18 12/18-42/54 60/18-42/18 12/90-42/18 12/18-42/90 84/18-42/18
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