: Find the value of:
\[20\% \,{\rm{of}}\,{\rm{70}}\,{\rm{Rs}}\]

Hint: The symbol of percentage simply represents the fraction form$\dfrac{1}{{100}}$. The percentage form can be converted into the decimal form by simply dividing the given value by the $100$. For example $10\% $ can be written as $\dfrac{{10}}{{100}} = 0.10$ in the decimal form.

Complete step-by-step answer:
Given, the number is :$70\,{\rm{Rs}}$
The given percentage is :$20\% $
We can convert a percentage in the fraction form.
$20\% = \dfrac{{20}}{{100}}$
Now we can calculate the percentage by multiplying the fraction to the given number.
$\begin{array}{l}
 = \dfrac{{20}}{{100}} \times 70\,{\rm{Rs}}\\
 = \dfrac{{1400}}{{100}}\\
 = 14\,{\rm{Rs}}
\end{array}$
So the answer of \[20\% \,{\rm{of}}\,{\rm{70}}\,{\rm{Rs}}\] is $14\,Rs$.

Note: In such types of percentage questions we can just multiply both numbers then we can get the final answer by dividing the obtained value by the number $100$.Percentage shows the fraction value $\dfrac{1}{{100}}$, so you can change the % into fraction $\dfrac{1}{{100}}$ and then you can solve further by applying simply arithmetic operations.