Solutions by everydaycalculation.com
1st number: 10 0/4, 2nd number: 5/21
404 ÷ 521 is 421.
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Related: 80/4÷5/21 40/4÷10/21 40/8÷5/21 40/4÷5/42 40/4÷15/21 40/12÷5/21 40/4÷5/63 40/4÷25/21 40/20÷5/21 40/4÷35/21 40/28÷5/21
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