Question

Kenny eats $\frac{1}{5}$ of a chocolate in 1 hour. How much of the chocolate can he eat in $\frac{4}{10}$ of an hour?

• A. $\frac{1}{16}$
• B. $\frac{1}{25}$
• C. $\frac{2}{25}$
• D. $\frac{3}{5}$

Answer 1

The correct option is C $\frac{2}{25}$

Quantity of chocolate Kenny eats in 1 hour $=\frac{1}{5}$
Quantity of chocolate Kenny eats in $\frac{4}{10}$ of an hour

$=\frac{1}{5}\times \frac{4}{10}$

$=\frac{1\times 4}{5\times 10}$

$=\frac{4}{50}$

Cancel out the common factors of numerator and denominator of the fraction

$=\frac{2\times 2}{2\times 25}$

$=\frac{2}{25}$