Solutions by everydaycalculation.com
1st number: 1/3, 2nd number: 2 3/21
13 - 4521 is -3821.
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Related: 2/3-45/21 1/3-90/21 1/6-45/21 1/3-45/42 1/9-45/21 1/3-45/63 5/3-45/21 1/15-45/21 7/3-45/21 1/21-45/21
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