Question

a family went on vacation and used 5.4 gallons of gasoline to travel 150 miles how many total gallons of gassoline will they need to travel 200 more miles

Answer 1

150 / 5.4 = 27.7777 miles per gallon

200 / 27.7777 = 7.2 gallons

Answer 2

Their consumption is 150 / 5.4  =  27.78  m p g
to travel 200 miles more they will need another 200/27.78 = 7.2 gallons