How to get answer:
Craigs, percent = difference/original = (7 - 4)/4 = 3/4 = 75%.
Answer:
am not sure but if u want to know says at the comment
Since the angles in triangle ACM indicate that it is a 30-60-90 triangle, we know that the other two sides of triangle ACM are 20 and 10 (30-60-90 triangles have a very specific side coefficient). This means that the sides of this triangle have side lengths 40, 10, and

. Adding these together you get 50+

. Hope this helps!
69.24 because you round the three up