Number of cellular phones (both Nokia and Samsung) sold by store B is what percent more than the number of Nokia cellular phones sold by store A?

Solution

Number of cellular phones (both Nokia and Samsung) sold by store B

= $$\frac{21}{100} \times 6400 = 1344$$

Number of Nokia cellular phones sold by store A

= $$\frac{24}{100} \times 3000 = 720$$

=> Required % = $$\frac{1344 - 720}{720} \times 100$$

= $$\frac{260}{3} = 86 \frac{2}{3} \%$$

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