There are total 8 movies
Priscilla watched 5
She has:
8 - 5 = 3 remaining
So,
3 out of 8 are remaining.
How much is that in percent??
We simply divide 3 by 8, get the decimal answer, mutliply by 100, we get the percentage!
Walla!!
So,
3/8 = 0.375
Multiply by 100: 0.375 * 100 = 37.5
So,
Priscilla has 37.5% of harry potter movies left to watch