Solutions by everydaycalculation.com
1st number: 6 0/2, 2nd number: 4 0/3
122 - 123 is 21.
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Related: 24/2-12/3 12/2-24/3 12/4-12/3 12/2-12/6 36/2-12/3 12/2-36/3 12/6-12/3 12/2-12/9 60/2-12/3 12/2-60/3 12/10-12/3 12/2-12/15 84/2-12/3 12/2-84/3 12/14-12/3 12/2-12/21
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