Ratios/Ratio Tables

A ratio is a comparison of two quantities that shows the relative size of one quantity to another, often expressed as 'a to b'.

Ratios can be written in three ways: using the word 'to' (e.g., 2 to 3), using a colon (e.g., 2:3), or as a fraction (e.g., 2/3).

The ratio of red to yellow marbles is 2 to 5.

The ratio of girls to boys is 7 to 5.

A simplified ratio means that the numbers in the ratio have been reduced to their smallest whole number form.

To find a missing value in a ratio table, use equivalent ratios or cross-multiplication.

The ratio of red apples to green apples is 4 to 3.

If there are 30 tenants, there are 50 cars.

An equivalent ratio is a ratio that expresses the same relationship between quantities, even if the numbers are different (e.g., 2:3 is equivalent to 4:6).

The simplest form of the ratio 10 to 15 is 2 to 3.