Distance biked by Mike = 3 1/2 mi = 3.5 mi
Distance biked by Noah = 5 1/4 mi = 5.25 mi
Distance biked by Noah/Distance biked by Mike = 5.25/3.50
Distance biked by Noah/Distance biked by Mike = 21/14 = 3/2
Distance biked by Noah = 3/2 times distance biked by Mike