So what I always do when seeing this is put in a variable ( x). I would then say 4/5 multiplied by x is 16. So X*4/5=16 now lets get X by itself so you divide both sides by 4/5 so it would look like this X=16/(4/5). Now what i do is divide 16 by just the numerator (4) that gives us 4 then you would multiply that answer by your denominator which would give you 20
