Solutions by everydaycalculation.com
821 - 59 is -1163.
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Related: 16/21-5/9 8/21-10/9 8/42-5/9 8/21-5/18 24/21-5/9 8/21-15/9 8/63-5/9 8/21-5/27 40/21-5/9 8/21-25/9 8/21-5/45 56/21-5/9 8/21-35/9 8/21-5/63
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