Answer:
It's rise/run.
May or not be right but I hope it helps!
I added the attachment.
X + x + 3(2+x)= 36
2x + 6 + 3x = 36
5x + 6 = 36
5x = 36 - 6
5x = 30
x = 6
Longer piece = 2 + 6 = 8inches
You didn’t give the question
6/40 6.0/40.0 because it’s decimal and percentage wiser