To solve a problem like this, we can set up a system of equations.
First remember that if two angles are complementary, the sum of their angles add up to 90 degrees.
Let's give these two angles names, X and Y
Since they are complementary, we know X + Y = 90
The problem also gives us that one angle is 14 times as large as the other, let's say that Y > X.
Then we also have 14X = Y
Now we can use these two equations to solve the problem
14X = Y
X + Y = 90
X + 14X = 90
15X = 90
X = 6
14X = Y
14(6) = Y
84 = Y