How do you find ratio of a right triangle to its perimeter

This is probably very simple, but I can't remember how to find a ratio. :)

Find the ratio of the longest side to the perimeter of the right triangle.
It is a right triangle.
The bottom 17 feet.
One side is 15 feet.
The other side is 8 feet.

I got 40 for the perimeter.

Can someone explain step by step how to find the ratio?

The ratio would be a fraction. 17 being your longest side, and 40 being the perimeter. So 17/40 would be the ratio of the right triangle.

Ratio = Longest side : Perimeter of the right trangle

So it would be, 17 feet : 40 feet