Solutions by everydaycalculation.com
1st number: 15/18, 2nd number: 1 6/18
1518 - 2418 is -12.
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Related: 30/18-24/18 15/18-48/18 15/36-24/18 15/18-24/36 45/18-24/18 15/18-72/18 15/54-24/18 15/18-24/54 75/18-24/18 15/90-24/18 15/18-24/90
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