Solutions by everydaycalculation.com
1st number: 1 4/12, 2nd number: 10/15
1612 + 1015 is 21.
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Related: 32/12+10/15 16/12+20/15 16/24+10/15 16/12+10/30 48/12+10/15 16/12+30/15 16/36+10/15 16/12+10/45 80/12+10/15 16/12+50/15 16/60+10/15 16/12+10/75 16/12+70/15 16/84+10/15
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