How do you convert 21.7% to a fraction in lowest terms?
I have deliberately gone the long way round to demonstrate a method that you can use on more complex questions. It is not really needed for this question.
Lets get rid of the decimal
Multiply by 1 and you do not change the value. However, 1 comes in many forms so you can change the way a number looks without changing its actual value.
So write Expression(1) as: