+71 One of the most common calculators seems to be the Ti-84 so i will explain it for that one, but also for all others too. 
this is a Ti-84
on it you will want to press Alpha, Y= and then you will see the fractions button. Now i guess there is a high chance you dont have one of these, so here is how to do it on any calculator with a division button. All you have to do is to type the fraction in but replace the line thingy(i dont know its name) with a division sign. That is all there is too it and you have a fraction on any calculator.
