Basically, you're going to want to divide 17 by 24, to do this you really would want a calculator to avoid long division.
17/24 = 0.708333333 (3 continuing), so lets round up to .708, I will give the un-rounded answer at the end.
So now all you do is move the decimal 2 places to the right:
You get:
Rounded Answer: 70.8% !
Same if you do the unrounded, you move the decimal place over 2 times:
Un-Rounded answer: 70.8333333333333%
