To prove the circles (or any polygon) are similar you need to establish a proportion between them that is multiplied or divided. Scale factors are products not sums, so A is out. We aren't translating, so B is out. We aren't flipping, so D is out.
Thus, the third choice of using a scale factor is best.
I think the answer is letter c
Hey there! :)
Blue: 8
Total: 30
Blue to total: 8/30 = 8 ÷ 30
Divide
8 ÷ 30 = 0.2666 = 0.27
0.27 = 27%
Your answer is 27%
Rounded to the nearest tenth: 26.6%
Rounded to the nearest whole: 27%
Hope this helps :)
If youre dividing it will be 5