Solutions by everydaycalculation.com
1st number: 16/18, 2nd number: 4 12/18
1618 - 8418 is -349.
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Related: 32/18-84/18 16/36-84/18 16/18-84/36 48/18-84/18 16/54-84/18 16/18-84/54 80/18-84/18 16/90-84/18 16/18-84/90
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