Answer:
45.75%
Step-by-step explanation:
The vertex is (-2,-8)
So the y-value would be -8
Let's say the angles are "a", "b" and "c"

so a = 28°, plug that in "b" and "c", to see how much each is.
GCF (Greatest Common Factor) of 60 100 = 20
60/100 reduced by 20 = 3/5 (Simplest Form)