Solutions by everydaycalculation.com
1st number: 9/21, 2nd number: 2 3/21
921 - 4521 is -127.
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Related: 18/21-45/21 9/21-90/21 9/42-45/21 9/21-45/42 27/21-45/21 9/63-45/21 9/21-45/63 45/21-45/21 63/21-45/21
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