6 liters of water was poured into the aquarium, filling six-sevenths of its volume.

6 liters of water was poured into the aquarium, filling six-sevenths of its volume. How many liters of water does the aquarium hold?

First, let’s look at what an ordinary fraction is. An ordinary fraction is a fraction consisting of a numerator and a denominator. In this case, the denominator shows how many equal parts the object or number was divided, and the numerator shows how many parts were taken.

In this case, the aquarium was conditionally divided into 7 equal parts. This can be written as:

7/7 = 1.

To solve the problem, you need to find how many liters of water fit in 1/7 of the aquarium. To do this, divide the number of liters that were poured into the aquarium by 6:

1/7 = 6: 6 = 1 l.

Now let’s multiply the resulting value by 7:

1 l * 7 = 7 l.

Answer: The aquarium holds 7 liters of water.