Solutions by everydaycalculation.com
1st number: 10/21, 2nd number: 5 5/7
1021 - 407 is -11021.
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Related: 20/21-40/7 10/21-80/7 10/42-40/7 10/21-40/14 30/21-40/7 10/63-40/7 10/21-40/21 50/21-40/7 10/21-40/35 70/21-40/7 10/21-40/49
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