Solutions by everydaycalculation.com
1st number: 20/21, 2nd number: 3 4/7
2021 - 257 is -5521.
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Related: 40/21-25/7 20/21-50/7 20/42-25/7 20/21-25/14 60/21-25/7 20/21-75/7 20/63-25/7 20/21-25/21 20/21-25/35 20/21-25/49
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