Solutions by everydaycalculation.com
1st number: 18/21, 2nd number: 3 7/21
1821 - 7021 is -5221.
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Related: 36/21-70/21 18/42-70/21 18/21-70/42 54/21-70/21 18/63-70/21 18/21-70/63 90/21-70/21
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