Solutions by everydaycalculation.com
1st number: 10/21, 2nd number: 6 6/7
1021 - 487 is -13421.
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Related: 20/21-48/7 10/21-96/7 10/42-48/7 10/21-48/14 30/21-48/7 10/63-48/7 10/21-48/21 50/21-48/7 10/21-48/35 70/21-48/7 10/21-48/49
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