Solutions by everydaycalculation.com
1st number: 15/18, 2nd number: 1 17/18
1518 - 3518 is -109.
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Related: 30/18-35/18 15/18-70/18 15/36-35/18 15/18-35/36 45/18-35/18 15/54-35/18 15/18-35/54 75/18-35/18 15/90-35/18 15/18-35/90
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