Laptop Sales Comparison: Store D vs. Store B

The question asks to find the approximate percentage by which the combined sales of laptops by Store D in February and May exceed the combined sales by Store B in January and March.

Calculating Combined Sales

First, identify the sales figures from the provided table:

• Store D sales in February: 360 laptops
• Store D sales in May: 306 laptops
• Store B sales in January: 312 laptops
• Store B sales in March: 336 laptops

Store D Sales Calculation

Calculate the total laptops sold by Store D in February and May:

$Total Sales (Store D)$ = Sales in Feb + Sales in May

$Total Sales (Store D)$ = $ 360 + 306 = 666 $ laptops

Store B Sales Calculation

Calculate the total laptops sold by Store B in January and March:

$Total Sales (Store B)$ = Sales in Jan + Sales in Mar

$Total Sales (Store B)$ = $ 312 + 336 = 648 $ laptops

Percentage Difference Calculation

Now, calculate the percentage by which Store D's combined sales are more than Store B's combined sales. The formula for percentage increase is:

$Percentage Increase$ = $ \frac{\text{Sales}_D - \text{Sales}_B}{\text{Sales}_B} \times 100 $

Substitute the calculated values:

$Percentage Increase$ = $ \frac{666 - 648}{648} \times 100 $

$Percentage Increase$ = $ \frac{18}{648} \times 100 $

Simplify the fraction:

$Percentage Increase$ = $ \frac{1}{36} \times 100 $

$Percentage Increase$ = $ \frac{100}{36} $

$Percentage Increase$ $ \approx 2.777... \% $

Final Answer Approximation

Rounding the result to two decimal places gives approximately 2.78%. This matches option D.