Solutions by everydaycalculation.com
1st number: 10/21, 2nd number: 10 0/7
1021 - 707 is -20021.
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Related: 20/21-70/7 10/42-70/7 10/21-70/14 30/21-70/7 10/63-70/7 10/21-70/21 50/21-70/7 10/21-70/35 70/21-70/7 10/21-70/49
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