Answer:
Read a bit so you can understand which one you want.
<u>Percentage</u>
15 skittles, 3 of the 15 are orange.
3 over 15, or 0.2 as a percentage.
So there is a 0.8% chance that he will NOT pick an orange skittle.
<u>Fraction</u>
15 skittles, 3 over 15.
3 over 15 can be 1 over 5.
So there is a 4 over 5 chance that he WONT grab an orange skittle, pretty good odds.