A bus travels 120 miles on 8 gallons of gas. At that rate how much gas will it need to travel 435 miles

120 miles on 8 gallons of gas ... 120/8 = 15 miles per gallon

435/15 = 29 gallons <==

or u can do it this way ...

120 / 8 = 435 / x ... 120 miles to 8 gallons = 435 miles to x gallons

cross multiply

(120) (x) = (435) (8)

120x = 3480

x = 3480/120

x = 29 <==

either way, u should get the same answer