Find the ratio of the angle

Question

The complement of an angle is fifteen less than half the angle. What is the ratio of this angle in simplest form?

Answer 1

90 = angle1 + angle2

angle2 = 0.5 * angle1 - 15

angle1= 70

angle2 = 0.5 * 70 - 15

angle2 = 35 - 15

angle2 = 20

ratio is 2:7 since the angles are 70 and 20.