# What does a 2:1 ratio mean?

A ratio is a comparison between two (or more) different quantities of the same unit.

A ratio does not tell us how many there are altogether, only how their numbers compare.

There are more boys than girls.

There are 2 boys for every girl

The number of boys is double the number of girls, which is the same as saying there are half as many girls as boys.

We do not know the total number of people at the match, but we do know that it is a multiple of 3.

If we are told that there are 720 people at the match, we will know that there are 480 boys and 240 girls.

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The number is split into two parts such that one is twice as large as the other.

For example, if you split 12 as a 2:1 ratio, you get 8 and 4 (one part twice is large as the other).

In general terms, you can work out the values like this:

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A 2:1 ratio means that for every two units of one quantity, there is one unit of another quantity. It represents the relationship between two quantities in terms of their comparative amounts.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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