How do you write $0.3$ as a fraction?

Hint:
It’s possible to write decimals in fraction form. To convert a decimal into a fraction, place the decimal number over its place value. For example, in $0.9$, the six is in the tenths place, so we place $9$ over $10$ to create the equivalent fraction, $\dfrac{9}{{10}}$. If it is needed, we need to simplify the fraction.

Complete Step by Step Solution:
According to the given information, we need to turn $0.3$ to fraction.
Here, the unit place is in ten’s.
 So, $0.3$ is equivalent to $\dfrac{3}{{10}}$
Properly written as: $0.3 = \dfrac{3}{{10}}$

Therefore, $0.3$ can be written as $\dfrac{3}{{10}}$.

Additional Information:
To turn decimal as a percent, we have to remember that $1$ equals $100\% $ and for that what we need to do is just to multiply the number by 100 and write $\% $ symbol against it. To convert this decimal form in percent in the form of $x\% $, for that we just need to multiply the fraction by $100$.

Note:
In short the relation between percent, decimal and fraction is given by,
$1\% = 0.01 = \dfrac{1}{{100}}$.
To turn decimal as a percent, we have to remember that $1$ equals $100\% $ and for that what we need to do is just to multiply the number by 100 and write $\% $ symbol against it.