Janelle can walk 3 3/4 miles in 1 1/2 hours. at this rate how many miles can janelle walk in 4 hours

Set up a ratio 3 3/4 = 15/4 and 1 1/2 = 3/2 so

((15/4miles) / (3/2hours)) = xmiles/4hours solve for x

so x = 4hours * ((15/4miles) / (3/2hours)) = x miles

the hours cancel and you are left with x miles = 10miles