the gas tank of your car holds 21 gallons. It is 1/3 full. How many gallons will it take to fill the tank?
1/3 * 21 = 7
You have 7 gallons. Subtract 7 from 21 to find the number of gallons you need to add.
14 gallons
well 14 2/5
To find out how many gallons it will take to fill the gas tank, you need to calculate the difference between the current level of gas in the tank and the total capacity of the tank.
First, you'll need to determine how many gallons are already in the tank. The problem states that the tank is currently 1/3 full. Since the capacity of the tank is 21 gallons, you can find out how many gallons are currently in the tank by multiplying 21 (total capacity) by 1/3.
21 * 1/3 = 7 gallons
Therefore, there are currently 7 gallons of gas in the tank.
Next, you can calculate how many more gallons are needed to fill the tank completely. Simply subtract the amount of gas already in the tank from the total capacity of the tank:
21 (total capacity) - 7 (current level of gas) = 14 gallons
So, it will take 14 gallons to fill the tank completely.