Number of Dell laptops sold by store Q is approximately what percent of the number of the number of laptops (both Dell and Lenovo) sold by store R?

Number of Dell laptops sold by store Q is approximately what percent of the number of the number of laptops (both Dell and Lenovo) sold by store R? Correct Answer 38%

Percent of Dell Laptops sold by store Q = 25%
Total number of Dell Laptops bold by store Q
$$\eqalign{& = 2400\times\frac{25}{100} \cr& = 600 \cr} $$
Percent of Laptops Dell and Lenovo sold by store R = 35%
Number of Laptops Dell and Lenovo sold by store R
$$\eqalign{& = 4500\times\frac{35}{100} \cr& = 1575 \cr& \therefore \text{Required Percentage} \cr& = \frac{600}{1575}\times100 \cr& = 38.095 \cr& \approx 38\% \cr} $$
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