thursday: got full tank of gas
friday: took a road trip, used one half the tank. One half of a tank of gas left
sunday: did the same here and used an additional one third of the tank
1/2 tank of gas minus 1/3 tank of gas = how much he has left
first you need a common denominator, we're going to use 6
then you need to multiply each fraction by 1 to get it to the same denominator.
to get the denominator of 2 to 6, you multiply by 3 so
1 x 3 = 3
2 3 6
do the same for 1/3, except multiply by 2 on both sides
1 x 2 = 2
3 2 6
now just subtract the two fractions
3 - 2 = 1
6 6 6
Jesse has 1/6 tank of gas left.