Solutions by everydaycalculation.com
1st number: 15/21, 2nd number: 8 1/6
1521 - 496 is -31342.
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Related: 30/21-49/6 15/21-98/6 15/42-49/6 15/21-49/12 45/21-49/6 15/63-49/6 15/21-49/18 75/21-49/6 15/21-49/30 15/21-49/42
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