Solutions by everydaycalculation.com
1st number: 16 0/4, 2nd number: 21/60
644 ÷ 2160 is 3207.
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Related: 64/4÷42/60 64/8÷21/60 64/4÷63/60 64/12÷21/60 64/20÷21/60 64/28÷21/60
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