###
**The average sale of car dealership was 15 cars per week. After a promotional scheme the average sale increased to 21 cars per week. The percentage increased in the sale of cars was-**

A. 39.33%
B. 40%
C. $42 \large\frac{6}{7} \%$
D. 140%
**Answer: Option B**

## Show Answer

Solution(By Apex Team)

Number of cars sold per week originally = 15 × 7 = 105
Number of cars sold per week under scheme = 21 × 7 = 147
Increase in sale = 147 – 105 = 42
∴ Percentage increase
$\begin{array}{l}
=\left(\large\frac{42}{105} \times 100\right) \% \\
=\left(\Large\frac{4200}{105}\right) \% \\
=40 \%
\end{array}$

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