Chris bought a package of loose leaf paper that contained 500 sheets. in the first week, he used 1/5 of the paper. he then used 2/5 of remaining paper

1/5 of 500 is 100. 500 - 100 leaves 400 sheets of paper.
to find 2/5 of the remaining 400 sheets divide 400/5 then multiply by 2
400/5= 80 x 2 = 160 sheets which is 2/5 of the remaining  400.

I’m confused as to what you are asking 66 2/3 percentage wise