35 feet wide by 50 feet long. what is the ratio of the length to the perimeter in simplest form?

For rectangular shapes the formula for perimeter would be
P = 2Length + 2 Width
since a rectangle would have 4 sides having the equal upper and lowers sides being the length and the equal left and right side being the width

Knowing this we look at the given
Our length is 50 ft and our width is 35 ft

Solving for the perimeter we have
P = 2(50) + 2(35)
P = 100 + 70
P = 170ft

The ratio of the length to the perimeter is simply Lenght:Perimeter or Length/Perimeter
We have
50:170
50/170
Reducing it to its simplest form
(L/P) = 5/17