About Ratios
A ratio is a relationship between two or more numbers showing how many times the first number contains the second.
Key Ratio Concepts
- Ratios can be written as a:b, a/b, or a to b
- Simplifying ratios means finding the equivalent ratio with the smallest possible values
- A proportion is an equation stating that two ratios are equal
- In a proportion a:b = c:d, the product of the means equals the product of the extremes (b×c = a×d)
Ratios are used in many real-world applications including cooking, construction, finance, and map scales.