Solutions by everydaycalculation.com
1st number: 1 3/12, 2nd number: 16/21
1512 - 1621 is 4184.
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Related: 30/12-16/21 15/12-32/21 15/24-16/21 15/12-16/42 45/12-16/21 15/12-48/21 15/36-16/21 15/12-16/63 75/12-16/21 15/12-80/21 15/60-16/21 15/84-16/21
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