This has more to do with Math but since the only problem is I don't understand the problem, figure I will ask here:
"what is the price of which 20% account for $20?"
From what I can understand, suppose the original price is x, then 20% of x is $20 right? then that mean x = $100
But the answer is actually $4.84! How on Earth can this be? Doesn't "account for" mean 20% = 20$?
Where did you find this bizarre question (and answer)?
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.