Solutions by everydaycalculation.com
1st number: 4 0/18, 2nd number: 3 9/18
7218 - 6318 is 12.
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Related: 72/36-63/18 72/18-63/36 72/54-63/18 72/18-63/54 72/90-63/18 72/18-63/90
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