Key Concepts

Glossary

ratio

A ratio compares two numbers or two quantities that are measured with the same unit. The ratio of \(a\) to \(b\) is written \(a\) to \(b\), \(\frac{a}{b}\), or \(a:b\).

rate

A rate compares two quantities of different units. A rate is usually written as a fraction.

unit rate

A unit rate is a rate with denominator of 1 unit.

unit price

A unit price is a unit rate that gives the price of one item.