Is it more difficult to secure a job in a store-based retailer in view of the tremendous growth of online retailing? What sort of training and development program would you attend to sharpen your career in retailing?

I am at the solution for this problem located here:  https://www.bartleby.com/questions-and-answers/during-the-morning-hours-at-a-catalog-sales-department-telephone-calls-come-in-at-the-rate-poisson-o/84d565ca-a1df-41b5-9faf-34fcebd84805      I just don't understand how they arrive with the solution below:   0.3903 = 1-P / 0.2963037 1-P = 0.1156.  I just don't understand the math here.  Any help in understanding will be extremely appreciate>

How can people shop in a way that reduces packaging waste?

Think of a company that you shop with online. Explain the benefits of shopping online.