Question

On a certain map 3/8 of an inch represents 120 miles. How many miles does 7/4 inches represent???? ( I need explonation plss)

Answer 1

3/8 in = 120 miles so,
120/3 = 40
40 x 8 = 320 so
320 miles = 1 in

7/4 or 1 3/4
320 + (320/4 x 3) = 560

7/4 in = 560 miles