Question

Find the difference:
$\frac{7}{10}$ $-$ $\frac{8}{25}$

• A. $\frac{7}{25}$
• B. $\frac{19}{50}$
• C. $\frac{17}{50}$
• D. $\frac{3}{25}$

Answer 1

The correct option is B

$\frac{19}{50}$

To find the value of $\frac{7}{10}-\frac{8}{25}$, we have to find the LCM od 10 and 25.
$\begin{array}{cc}2& 10,25\\ 5& 5,25\\ 5& 1,5\\ & 1,1\end{array}$
LCM of 10 and 25 $=2\times 2\times 5=50$

$\frac{7}{10}-\frac{8}{25}$ $=\frac{7\times 5}{10\times 5}-\frac{8\times 2}{25\times 2}=\frac{35}{50}-\frac{16}{50}=\frac{35-16}{50}=\frac{19}{50}$