| Term | Definition |
| Ratio | Comparing numbers with division |
| Proportion | A statement where two fractions/ratios are equal |
| Means | The inside numbers of a proportion/ratio |
| Extremes | The outside numbers of a proportion/ratio (think exterior) |
| Cross Products | Cross multiply the means and extremes and put them equal to each other |
| Probability | The chance that something will happen after a series of trials. |
| Favorable Outcome | The outcome you would perfer happen. |
| Experimental Probability | Favorable outcome divided by the number of trials. |
| Percent | A ratio that compares a number with 100 |
| Equally Likely Outcome | The likelyhood of events happening is equal |
| Sample Space | A list of all of the outcomes |