Solve this : (7.9% of 134) - (3.4% of 79) = ?

Answer: Option E

(7.9% of 134) - (3.4% of 79)
$$=\left(\frac{79}{10}\times \frac{1}{100}\times 134\right)-$$     $$\left(\frac{34}{10}\times \frac{1}{100}\times 79\right)$$
$$\begin{array}{rl}& =\frac{79}{1000}\times \left(134-34\right)\\ & =\frac{79}{1000}\times 100\\ & =\frac{79}{10}\\ & =7.9\end{array}$$