It is given that two complementary angles are in the ratio 7:8.
Consider 7x and 8x as the angles.
We know that, if two angles are complementary, then their sum is 90o.
Then, 7x+8x=900
⟹ 15x=900
⟹ x=9015=60.
Here, the angles will be:
7x=7×6o=420 and 8x=8×6=480.