When you have another person carpooling with you and your friend, the cost of the gas is split among three people instead of just two. This means that each of you will pay only a portion of the total gas cost. To calculate the amount saved per person, you need to compare the original cost for two people with the cost when shared among three individuals.
Here's how you can determine the savings per person:
1. Calculate the total cost of the gas for the trip when only you and your friend are sharing the tank.
2. Divide this total cost by 2 to find out how much each of you would pay individually.
3. Next, calculate the total cost of the gas for the trip when three people are sharing the tank.
4. Divide this total cost by 3 to determine how much each person pays when shared among three individuals.
5. Finally, subtract the individual cost when carpooling with three people from the individual cost when carpooling with just one other person. This difference is the amount saved per person by having a third person share the tank of gas.
By following these steps, you can accurately determine and understand how much you and your friend save by having a third person share the tank of gas.
