Verified Answer :

First you need to  convert the given percentage into fraction by dividing it by 100 and removing percentage symbol (%).
Then you reduce the fraction into simplest forms.
Finally you write the 
 fraction turned simplest form to a ratio by writing 
the numerator first,then the denominator.
Example:50%=\(\frac{50}{100}\)\(= \frac{1}{2}\).

=1:2