Question

When might it be easier to write the percent as a fraction rather than as a decimal? Please give an example

Answer 1

Maybe when its an easy simple fraction. For example 1/4= 25% and 1/2= 50%.

Answer 2

When your percent value is something like 75% or 50%.
75% is the same as $\frac{3}{4}$

50% is the same as $\frac{1}{2}$