# Ratios & Percentages

### Example 1

Cross multiply and set equal to each other. |

### Example 2

### Example 3

Cross multiply and set equal to each other. |

### Example 4

### Example 5

An Alaskan wildlife preserve Ranger wants to figure out how many moose live in the preserve. To do this, she randomly catches and tags 50 moose and releases them. A few months later, she catches 75 moose and sees that 20 of them are tagged. Approximately how many moose live on the preserve? |

### Example 6

The ratio of girls to boys in your class is 4:5. Assuming that this ratio is consistent throughout the school, approximately how many boys would be in a school of 525 students? |