Question

$\frac{2}{15}-\frac{1}{10}$=

• A. $\frac{1}{5}$
• B. $\frac{1}{15}$
• C. $\frac{1}{10}$
• D. $\frac{1}{30}$

Answer 1

The correct option is D $\frac{1}{30}$

Consider $\frac{2}{15}-\frac{1}{10}$.
Note that the LCM of 10 and 15 = 30.

Now, $\frac{2}{15}-\frac{1}{10}$ =$\frac{2\times 2}{15\times 2}-\frac{1\times 3}{10\times 3}$

$=\frac{4}{30}-\frac{3}{30}=\frac{4-3}{30}=\frac{1}{30}$.

=$\frac{1}{30}$