Kristen sells cars for a living. Each month, she earns \({\$1{,}000.00}\) of base pay, plus a certain percentage of commission from her sales.

One month, Kristen made \({\$74{,}000.00}\) in sales, and earned a total of \({\$2{,}909.20}\) in that month (including base pay and commission). What percent commission did Kristen earn?

Fill in the blank with a percent.

Kristen earned in commission.