At a Mexican fast-food chain, a customer a) decides what type of food s/he wants (e.g., burrito, salad, or tacos), b) decides what fillings s/he wants (e.g., chicken, fish, or vegetable), c) decides what toppings s/he wants (e.g., lettuce, guacamole, or cheese), and d) pays for the order that may or may not include a drink.

Per customer, step a) takes 2.9 minutes on average, step b) takes 3.2 minutes on average, step c) takes 2.7 minutes on average, and step d) takes 3 minutes on average.

Currently, each station is manned by 1 person. By how much would the system capacity increase if we added another person for step B (filling)?

Round your answer to two decimals. For example, if your answer is 13.7%, write down 0.14.