For ideal gases it is known that PV = constant, where P is the pressure of the gas and V is the volume of the vessel containing it. How does the pressure of the gas contained in a vessel decreasing in volume at a rate of 0.01 liters per second vary? When V = 500 cm² and P = 20 kg per cm²

Give the answer in decimals using only one decimal point and use the same units as P.