A balloon is inflated to a volume of 83 L on a day when the

A balloon is inflated to a volume of 8.3 L on a day when the atmospheric pressure is 652 mm Hg. The next day, as a storm front arrives, the atmospheric pressure drops to 620 mm Hg. Assuming the temperature remains constant, what is the new volume for the balloon, in liters?

p1v1 = p2v2

8.3*652 = 620*v2