For ordering greatest to least, you'll need to put the least amounted number, let's say 1 for example, you'll need to put it at the end of the line.
comparing the two, 10 and 1, which one has a higher power than the other?
Always negative when dealing with expontents
6/8 = 0.75
0.75 x 100 = 75%
D. None of the above
Hope this helps!
