Solutions by everydaycalculation.com
1st number: 12/21, 2nd number: 3 7/21
1221 + 7021 is 8221.
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Related: 24/21+70/21 12/42+70/21 12/21+70/42 36/21+70/21 12/63+70/21 12/21+70/63 60/21+70/21 84/21+70/21
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