Solutions by everydaycalculation.com
1st number: 18/21, 2nd number: 4 6/21
1821 - 9021 is -247.
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Related: 36/21-90/21 18/42-90/21 18/21-90/42 54/21-90/21 18/63-90/21 18/21-90/63 90/21-90/21
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