| A | B |
| Percent | A ratio that compares a number to 100. |
| Percent Proportion | Compares part of a quantity to the whole quantity using a percent. |
| Part | The number that is being compared to the whole quantity in a percent proportion. |
| Base | In a percent proportion, the number to which the percentage is compared. |
| Compatible Numbers | Two numbers that are easy to add, subtract, multiply or divide mentally. |
| Percent Equation | An equivalent form of the percent proportion in which the percent is written as a decimal. |
| Percent of Change | A ratio that compares the change in a quantity to the original amount. |
| Percent of Increase | The percent of change when the new amount is greater than the original. |
| Percent of Decrease | The percent of change when the new amount is less than the original. |
| Markup | The amount the price of an item is increased above the price the store paid for the item. |
| Selling Price | The amount a customer pays for an item. |
| Discount | The amount by which a regular price is reduced. |
| Interest | The amount of money paid or earned for the use of money |
| Principal | The amount of money invested or borrowed. |