Answer:
B
Step-by-step explanation:
You can divide the larger number by the smaller number for all of them and see if they all match. If they dont then its not porportional.
Start writing 78% as a fraction or decimal

Multiply by the number 80

The 78% of 80 is equal to 62.4
A = pi * r^2.....r = radius and pi = 3.14
A = (3.14)(13^2)
A = 3.14(169)
A = 530.66