Fraction as a percentage
There are some fractions that are used more frequently than others. For instance, the fractions whose denominator is $100$. These fractions are usually called percentages and they appear very often in our everyday life.
When we use a percentage, $25\%$, for example, we are using the numerator of a fraction whose denominator is $100$.
In other words, $25\%$ is equivalent to the fraction $\displaystyle \frac{25}{100}$, which is equivalent to $\displaystyle \frac{1}{4}$.
The $25\%$ of $174$ is the same as calculating $\dfrac{25}{100}$ of $174$:
$$174\cdot \dfrac{25}{100}=174\cdot \dfrac{1}{4}=43,5$$