Solutions by everydaycalculation.com
1st number: 20/21, 2nd number: 1 1/7
2021 - 87 is -421.
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Related: 40/21-8/7 20/21-16/7 20/42-8/7 20/21-8/14 60/21-8/7 20/21-24/7 20/63-8/7 20/21-8/21 20/21-40/7 20/21-8/35 20/21-56/7 20/21-8/49
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