SOLUTION: Eric needs to fill up his gas tank which holds 21 liters and is currently a third empty how many liters of gas will it take to fill the tank?

Question 529466: Eric needs to fill up his gas tank which holds 21 liters and is currently a third empty how many liters of gas will it take to fill the tank?
Found 2 solutions by stanbon, nahataba:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Eric needs to fill up his gas tank which holds 21 liters and is currently a third empty how many liters of gas will it take to fill the tank?
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Ans: (1/3)21 = 7 gallons (amt. he needs to fill the tank)
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Cheers,
Stan H.
Answer by nahataba(3) (Show Source): You can put this solution on YOUR website!
if the gas tank is a third empty, you find two thirds of 21. one third of it is 7 because 21 divided by 3 is seven. two thirds would be 7 x 2=14. then you find the difference of 21 and 14 which is seven. so, he would need 7 more liters to fill the tank.
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