Please do this thank you will give brain liest if correct..

The easiest thing to do here is to split into two right triangles. The split will occur at x=1.

A= (base times height) / 2

Height of both is 3
Base of left is 6
Base of right is 3

(6*3)/2 = 9
(3*3)/2 = 4.5

Now, add together.

9 + 4.5 = 13.5 sq units

To do this put into the calculator 30 divided by 35, which will get you about 0.8571 and for percentage you multiply it by hundred so that will get you about 85.71% and then round it to the nearest percentage, and since 7 is greater then 5 you would round up so your rounded percentage would be 86%