How do i do this i need help fast

Answer:
you do it with.... MATH!
but the answer is 64%
see, 5x5=25
3x3=9
25-9=16
16/25 = 0.64 = 64%
brainliest me for answering that for you, thanks.
Answer:
C. 64%
Step-by-step explanation:
(25 - 9) / 25 = 16/25 = 0.64