Question

Express $1$ hr $36$ minutes as the percent of $2$ hours $40$ minutes.

• A. $30\%$
• B. $40\%$
• C. $50\%$
• D. $60\%$

Answer 1

The correct option is D $60\%$

$1$ hour $=60$ minutes.
Therefore, $1$ hour $36$ minutes $=\left(\begin{array}{c}60+36\end{array}\right)$ minutes $=96$ minutes and
$2$ hours $40$ minutes $=\left(\begin{array}{c}120+40\end{array}\right)$ minutes $=160$ minutes
Required percent $=\frac{96}{160}\times 100$ $=$ $60$ $\%$