A car salesman had $65,100 in total monthly sales last month. He made $1,953 in commission from those sales. What is the salesman's commission as a percent of his total monthly sales?

Martha is training for a duathlon, which includes biking and running. she knows that yesterday she covered a total distance of over 55.5 miles in more than than 4.5 hours of training. martha runs at a speed of 6 mph and bikes at a rate of 15.5 mph.