Solutions by everydaycalculation.com
1st number: 18/21, 2nd number: 4 4/9
1821 - 409 is -22663.
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Related: 36/21-40/9 18/21-80/9 18/42-40/9 18/21-40/18 54/21-40/9 18/63-40/9 18/21-40/27 90/21-40/9 18/21-40/45 18/21-40/63
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