Question

A student scored $600$ the first time. She took the mathematics portion of a college entrance exam. The next time she took the exam, she scored $660$. Her second score represents what percent increase over her first score?

• A. $9.1\%$
• B. $10.0\%$
• C. $39.6\%$
• D. $60\%$

Answer 1

The correct option is A

$9.1\%$

Number of marks she scored in first attempt in the exam = $600$
Number of marks she scored in second attempt in the exam = $660$.

Difference in the score $=660-600=60$

Percentage increase in her second score over her first score

$$\begin{gathered} =\frac{60}{100}\times 100 \\ =0.9090\times 100=9.1\% \end{gathered}$$

Hence $F=9.1\%$ is the Percentage increase in her second score over her first score.