Activity 1 1-19-11 Ideal Gas Law

What is the tire pressure at -20°F compared to 90°F, assuming the starting pressure was 32 psi?

First you have to convert 90 and -20 degrees into Kalvin.
So the equation looks like
32 psi          
______ = ______psi
305.2 K    244.1 K

equals 25.6 psi