Solutions by everydaycalculation.com
1st number: 15/18, 2nd number: 2 6/18
1518 - 4218 is -32.
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Related: 30/18-42/18 15/18-84/18 15/36-42/18 15/18-42/36 45/18-42/18 15/54-42/18 15/18-42/54 75/18-42/18 15/90-42/18 15/18-42/90
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