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# unit 3 Vocabulary

### Ratios, Rates, and Proportions

TermDefinition
Complex Fractions A fraction that has a fraction in its numerator, denominator or both.
Constant of Proportionality The constant ratio between two quantities in a proportional relationship.
Equivalent ratios Ratios that name the same comparison
Indirect Measurement The technique of using similar figures and proportions to find a measure.
Percent of Decrease A percent change describing a decrease in a quantity.
Percent of Change The amount stated as a percent that a number increases or decreases.
Percent of Increase A percent of change describing an increase in a quantity.
Principal The initial amount of money borrowed or saved.
Proportion An equation that states that two ratios are equivalent.
Proportional Relationship A relationship between two quantities in which the ratio of one quantity to the other quantity is constant.
Scale The ratio between two sets of measurement.
Scale Drawing A drawing that uses a scale to make an object smaller than or larger than the real object.
Simple Interest A fixed percent of the principal. It is found using the formula I=Prt, where P represents the principal, r the rate, and t the time.
Unit Rate A rate in which the second quantity in the comparison is one unit.
Created by: sbatdorf01