Solutions by everydaycalculation.com
1st number: 1 3/18, 2nd number: 15/18
2118 - 1518 is 13.
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Related: 42/18-15/18 21/18-30/18 21/36-15/18 21/18-15/36 63/18-15/18 21/18-45/18 21/54-15/18 21/18-15/54 21/18-75/18 21/90-15/18 21/18-15/90
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