thats up to you...you could use all perlite or all soil....i would say......use like a tub or something...and a cup of any kind...put a 2 inch layer of stright perlite on the bottom....then mix 1part perlite and 3 parts soil in the tub untill you have enough to fill your part...
it makes the soil airy and easy for the roots to go threw...the more you use the more often you will have to water...im sure you will hear many diffrent answers as its a matter of what the grower likes.