68 miles to 42.5 is what percent of decrease??
68 miles to 42.5's percent of decrease is: 37.5%Using proportions. 68 miles - 42.5 = 25.525.5 x------ = -----68 100Cross multiply:25.5 x 100 = 255068 multiply x = 68x2550 divided by 68 = 37.5x = 37.5%