Instead of doing your work for you I will do this problem instead,
which is exactly like yours, only with the numbers changed.
if a pair of complementary angles are in the ratio 5:13, find them. :)
Let the complementary angles be x° and 90°-x°.
x°:(90°-x) = 5:13
The product of the means equals the product of the extreme:
(90°-x)(5) = (x°)(13)
90∙5 - 5x = 13x
450 - 5x = 13x
450 = 18x
25 = x
So one angle is 25° and the other is 90°-25° = 65°
Now use this as a guide to doing your problem.
Edwin