Proportionality Vocab

Front

A ratio comparing a number to 100

Back

percent

Front

Percent change indicating a decrease in quantity.

Back

percent of decrease

Front

Percent change indicating an increase in quantity.

Back

percent of increase

Front

Amount as a percent that a number changes.

Back

percent of change

Front

A ratio comparing two quantities in different units. Ex: 300 miles/2 days

Back

rate

Front

Comparison of two quantities by division (e.g., 2 girls : 3 boys).

Back

ratio

Front

Rate where the second quantity is one unit (e.g., 75 mph, $5/day).

Back

unit rate

Front

3/5 = x/15. An equation stating two ratios are equivalent.

Back

proportion

Front

A letter representing a number and the missing piece in a proportion.

Back

variable