How to find the angles of a triangle when given the ratio?

Let's suppose you are given the ratio:

6, 7 and 8

First we sum the ratios and get 21

Then we divide each ratio by the total and multiply by 180.

(6 / 21) * 180 = 51.43 degrees

(7 / 21) * 180 = 60 degrees

(8 / 21) * 180 = 68.57 degrees