Question

Aquarium An aquarium has twice as many angelfish as goldfish. The aquarium contains only angelfish and goldfish. Write a ratio for the number of goldfish to the total number of fish.

Short answer

The required ratio for the number of goldfish to the total number of fish is 1:3.

Step-by-step solution

. Given

Given that the aquarium has twice as many angelfish as goldfish. And the aquarium contains only angelfish and goldfish.

. To determine

We have to find the ratio for the number of goldfish to the total number of fish.

. Calculation 

Given that the aquarium has twice as many angelfish as goldfish.

Let the number of goldfish = x.

So, the number of angelfish = 2x.

So, the total number of fishes = x + 2x= 3x.

Ratio for the number of goldfish to the total number of fish is given by:

$\begin{array}{l}\frac{\text{Numberofgoldfish}}{\text{Totalnumberoffish}}\\ \Rightarrow \frac{x}{3x}\left[\text{Dividethecommonunits}\right]\\ \Rightarrow \frac{1}{3}\end{array}$

We can also write the ratio as 1:3.

So, the required ratio for the number of goldfish to the total number of fish is 1:3.