Solutions by everydaycalculation.com
1st number: 18/21, 2nd number: 1 5/9
1821 - 149 is -4463.
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Related: 36/21-14/9 18/21-28/9 18/42-14/9 18/21-14/18 54/21-14/9 18/21-42/9 18/63-14/9 18/21-14/27 90/21-14/9 18/21-70/9 18/21-14/45 18/21-98/9 18/21-14/63
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