Solutions by everydaycalculation.com
1st number: 16/21, 2nd number: 1 9/21
1621 + 3021 is 4621.
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Related: 32/21+30/21 16/21+60/21 16/42+30/21 16/21+30/42 48/21+30/21 16/21+90/21 16/63+30/21 16/21+30/63 80/21+30/21
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