Aisha's first summer job requires her to travel downtown. She is interested in finding out how most people get to work each day, so she finds the results of an online survey. According to the survey below, what percent of the workers walk to work?

drive alone. 7,862,418
carpool 1,120,982
take public transit 144,959
walk 138,496
other means 149,641
work at home 346,626