What percent of the population used Motorola devices? Round to the nearest tenth of a percent

Question

In March 2010, a total of 234 million people age 13 or older in the U.S. used mobile devices. Of these, 51.2 million people used devices manufactured by Motorola. What percent of the population used Motorola devices? Round to the nearest tenth of a percent

Answer 1

51.2/234=0.2188=21.88%=21.9%