| A | B |
| percent | A ratio whose denominator is 100. |
| percent of change | The percent that a quantity from the original amount. |
| percent of increase | The percent of change when the original amount increases. |
| percent of decrease | The percent of change when the original amount decreases. |
| discount | A decrease in the original price of an item. |
| markup | An increase from the original cost to the selling price. |
| interest | Money paid or earned for the use of money. |
| principal | An amount of money borrowed or deposited. |
| simple interest | Money paid or earned only on the principal. I=prt. |