What is a ratio?

Ratios are used to show how things are shared. For example, the necklace in the image has a pattern of two red beads for every three yellow beads.

Necklace consisting of red and yellow beads

The ratio of red beads to yellow beads is \(2 : 3\).

Ratios can have more than two numbers for example: \(3 : 4 : 2\).