Solutions by everydaycalculation.com
1st number: 16 0/4, 2nd number: 7/12
644 - 712 is 18512.
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Related: 64/4-14/12 64/8-7/12 64/4-7/24 64/4-21/12 64/12-7/12 64/4-7/36 64/4-35/12 64/20-7/12 64/4-7/60 64/4-49/12 64/28-7/12 64/4-7/84
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