Solutions by everydaycalculation.com
1st number: 4/21, 2nd number: 1 1/7
421 - 87 is -2021.
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Related: 8/21-8/7 4/21-16/7 4/42-8/7 4/21-8/14 12/21-8/7 4/21-24/7 4/63-8/7 4/21-8/21 20/21-8/7 4/21-40/7 4/21-8/35 28/21-8/7 4/21-56/7 4/21-8/49
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