Question

The fish tank holds 32.176 liters. Jeffrey poured 1 3/4 gallons of water into the empty fish tank. What percentage of the tank does he still need to fill?

Answer 1

He still needs to fill 79.43% of the tank.

Explanation:

How much of the tank he filled?

1 3/4 gallons

As a decimal number, this is:

`1(3)/(4)=1+(3)/(4)=((4)/(1)\ast1+(4)/(4)\ast3)/(4)=(4+3)/(4)=(7)/(4)=1.75`

Conversion to liters:

1 gallon has 3.785 liters.

So, for 1.75 gallons, we have 1.75*3.785 = 6.62 liters.

The fish tank holds 32.176 liters.

So, he still needs to fill 32.176 - 6.62 = 25.556 liters.

What percentage of the tank does he still need to fill? ​

We divide what need to be filled by the total capacity, and multiply by 100. So

`(25.556)/(32.176)\ast100=0.7943\ast100=79.43`

He still needs to fill 79.43% of the tank.