Answer:
the greatest is 17/20, second greatest is .8 and last is 75%
Explanation:
so all of these can be written in decimals(because they can have a common denominater of 100) so 17/20 equals .(17 x 5) which is .85. 75% is just .75 and .8 is, well .8. now we compare .85, .75 and .8, and the greatest is .85, second .8 and last is .75. now we put them back to the state they were first in to get the answer