20/99 = 0.20 recurring (that is, 0.202020...)
99/20 divided by 20 = 4.95 as a terminating decimal
20
3
60/99 or 20/33
0.33
4.125
20% off of $99 = $79.2 = 20% discount applied to $99 = $99 - (20% * $99) = $99 - (0.20 * $99) = $99- $19.8 = $79.2
99
1
9
99/20 cannot be simplified.
0.0606