How do you convert 125% to a fraction in lowest terms?

##5/4##

If you figure out 25%=##1/4## and 100% is ##4/4## and add them you get ##5/4## in this case. If it were 150% it'd be ##3/2## and so on. Though to be completely honest with you the best course of action is trial and error- with educated guesses, of course.