two - term ratio,

three - term ratio,

part to part ratio,

part to whole ratio,

unit rate,

unit price,

and proportion,

Two-Term Ratio: Compares two quantities measured to the same units written as a:b or a to b.

eg. 2:4 2 to 4

Three-Term Ratio: Compares three quantites measured in the same units, written as a:b:c or a to b to c. eg. 2:4:6 4 to 6 to 2

Part to Part Ratio: Compares different parts of a group together.

Part to Whole Ratio: Compares one part of a group to the whole group.

Can be written as 2:3 or b / c

Unit Ratio: It's a rate in which the second term is 1.

eg. 5 km per hr is a unit rate.

Unit Price: It's a rate that involves prices.

eg. $2/hr is a unit price.

Proportion: Is Used to compare two ratios or make equivalent fractions.

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