Solutions by everydaycalculation.com
1st number: 12/21, 2nd number: 1 9/21
1221 + 3021 is 21.
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Related: 24/21+30/21 12/21+60/21 12/42+30/21 12/21+30/42 36/21+30/21 12/21+90/21 12/63+30/21 12/21+30/63 60/21+30/21 84/21+30/21
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