Solutions by everydaycalculation.com
1st number: 15/21, 2nd number: 3 2/4
1521 is smaller than 144
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Related: 30/21 and 14/4 15/21 and 28/4 15/42 and 14/4 15/21 and 14/8 45/21 and 14/4 15/21 and 42/4 15/63 and 14/4 15/21 and 14/12 75/21 and 14/4 15/21 and 70/4 15/21 and 14/20 15/21 and 98/4 15/21 and 14/28
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