Solutions by everydaycalculation.com
1st number: 1 6/15, 2nd number: 16/21
2115 - 1621 is 67105.
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Related: 42/15-16/21 21/15-32/21 21/30-16/21 21/15-16/42 63/15-16/21 21/15-48/21 21/45-16/21 21/15-16/63 21/15-80/21 21/75-16/21
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