*This means that, for every 2 units of height, there must be 3 units of width.*

A proportion is simply a statement that two ratios are equal.

It can be written in two ways: as two equal fractions a/b = c/d; or using a colon, a:b = c:d.

When scaling ratios up or down, always remember that the same unit of measurement must be applied to both sides; i.e. As a result, the piece of fabric must be 120mm wide.

4 - Writing a ratio in the form 1:n or n:1 As well as being able to write a ratio in its simplest form, you must also be able to write a ratio in the form: 1:n or n:1 where 'n' can be any whole number, fraction or decimal.

The specific questions you will be expected to answer will vary depending upon which examination board with which you are registered, but as a rule you will be required to: 1 - Dividing in a ratio Without realizing, you use ratios every day in order to divide and share out amounts fairly.

As a result, there will be questions within your GCSE maths exam where you will be required to use ratios in order to share out amounts of money or other items: (a) - Firstly, you need to find the total number of parts in the ratio.

We can divide both sides of the equation by the same number, without changing the meaning of the equation.

When we divide both sides by 20, we find that the building will appear to be 75 feet tall.

wiki How is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. They can compare absolute quantities and amounts or can be used to compare portions of a larger whole.

To create this article, 49 people, some anonymous, worked to edit and improve it over time. Ratios can be calculated and written in several different ways, but the principles guiding the use of ratios are universal to all.

## Comments Problem Solving With Ratios

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