Answer:
To find percent change, we do: ( new-old / old ) * 100
So,
30 is old, 15 is new.
15 - 30 / 30
= -15 / 30 = -1/2 (100) = -50%
15
Step-by-step explanation:
because 30 -15 = 15
And he lost 15 points from the last game he played
