Question 530224
The ratio of 5:4 means the 90 degrees of the complementary angles are divided into 9 parts.
90/9 = 10 degrees.
So, one angle is 5*10 = 50 degrees; and the other is 4*10 = 40 degrees.
50/40 = 5/4, which checks.
Answer:  The smaller angle is 40 degrees.