C&A Fast Food has four activities in serving a customer: greet customer, take order, process order, and deliver order. Each activity is staffed by one employee $($for a total of four employees$).$ The processing time for each activity is given as follows:

$\backslash$table$[[$Activity$,$Processing time per customer$],[$Greet customer,$2$ seconds$],[$Take order,$30$ seconds$],[$Process order,$60$ seconds$],[$Deliver order,$5$ seconds$]]$

Assume demand is unlimited. If one additional employee is added to the bottleneck activity, what will be the percentage change in process capacity?