Solutions by everydaycalculation.com
1st number: 1 3/18, 2nd number: 2 0/18
2118 - 3618 is -56.
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Related: 42/18-36/18 21/18-72/18 21/36-36/18 63/18-36/18 21/54-36/18 21/18-36/54 21/90-36/18 21/18-36/90
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