Verified Answer :

you could write it as a fraction:
65/80
Both numbers are divisible by 5 so you can get
13/16,
or 13 out of 16

65/80 simplified would be......

65 / 80 =
(5 13) / (24 5) =
((5 13) : 5) / ((24 5) : 5) =
(65 : 5) / (80 : 5) = 13 / 16