Leonardo ran 1.5 miles. How many yards did Leonardo run? Use the proportion to solve. 1 mile/1,760 yards=1.5 miles/?

1.5 miles x (1,760 yards/1 mile) = 2640 yards

Since you have 1,760 yards per mile, you can multiply this proportion by the number of miles you have (1.5). The miles then cancel and you get a distance in yards.