Gustav sells cars for a living. Each month, he earns \({\$1{,}100.00}\) of base pay, plus a certain percentage of commission from his sales.

One month, Gustav made \({\$69{,}600.00}\) in sales, and earned a total of \({\$3{,}271.52}\) in that month (including base pay and commission). What percent commission did Gustav earn?

Fill in the blank with a percent.

Gustav earned in commission.