What is the percent of molecules?

Question

A container holds two gases, A and B. Gas A has a partial pressure of 325 torr and gas B has a partial pressure of 488 torr. What percent of the molecules in the mixture is gas A?

Answer 1

Total pressure = 325 torr + 488 torr = 813 torr

325/813 = 0.3997 represents the fraction of molecules that is Gas A

% of molecules that is gas A = 39.97%