Four out of every five visitors at an amusement park buy day passes what percent of the visitors buy passes?

80% 
THis is because you are supposed to multiply 20 to the denomintaor and numerator.
4 times 20=80
~JZ
Hope it helps

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.

What do you mean by that?