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Proportions % Vocab
| Term | Definition |
|---|---|
| ratio | a comparison of two quantities by division |
| rate | a ratio that compares two quantities measured in different units |
| unit rate | A rate in which the second quantity in the comparison is one unit |
| constant speed | a type of unit rate that comparing distance to 1 unit of time (miles per hour, meters per second, etc.) |
| unit price | a unit rate that gives the cost per 1 unit |
| proportion | an equation showing that two ratios are equal |
| equivalent | having the same value, specifically two or more ratios that have the same value |
| cross product | the product of the numerator of one ratio and the denominator of another ratio; in a proportion, these are equal to one another |
| similar figures | figures that have the same shape but not necessarily the same size; their corresponding sides have lengths that are proportional |
| scale drawing/model | a ratio of the drawing or model size to the actual size that is used to represent objects smaller or larger than their original size |
| scale OR scale factor | the ratio used to enlarge or reduce similar figures, written as drawing/model size to original size |
| corresponding angles | the angles that are in the same relative position in similar figures |
| corresponding sides | sides that have the same relative positions in geometric figures |
| constant of proportionality | the value that represents a proportional linear relationship, represented by k |
| percent | a ratio that compares a number to 100 |
| percent change | a ratio that compares the amount of change in a quantity to the original amount |
| percent increase | percent of change when the new amount is greater than the original |
| percent decrease | percent of change where the new number is less than the original number |
| sales tax | A tax, given as a percent, on the sale of merchandise or services |
| commission | an amount paid to an employee based on a percentage of the employee's sales |
| discount rate | the percent taken off the original price of an item being sold |
| simple interest | Interest earned only on the original principal amount invested |
| principal | the amount of money borrowed or invested |
| interest rate | the percent of a loan that is charged extra to the borrower |
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