Solutions by everydaycalculation.com
23 - 1021 is 421.
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Related: 4/3-10/21 2/3-20/21 2/6-10/21 2/3-10/42 6/3-10/21 2/3-30/21 2/9-10/21 2/3-10/63 10/3-10/21 2/3-50/21 2/15-10/21 14/3-10/21 2/3-70/21 2/21-10/21
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