What is the biggest number that can go into 40 and 20

When are two distinct non vertical lines parallel

The pressure exerted on the walls of a container by a gas enclosed within it is directly proportional to the temperature of the gas. if the pressure is 6 pounds per square inch when the temperature is find the pressure exerted when the temperature of the gas is 380 degrees f show work for the

Question and answers are in the attached picture. you so much in advance.