Question

What are the three basic uses of percentages? Provide a sample statement that uses percentages in each of the three ways.

Answer 1

Percentages have three basic uses: describing part-whole relationships, expressing proportions, and measuring change.

Step-by-step explanation:

The three basic uses of percentages are:

1. Describing Part-Whole Relationships: For example, if 80% of adults own an automobile nationally, you can say that 80 out of 100 adults own a car.
2. Expressing Proportions: For example, if you draw a sample of 100 adults in your community and find that 75% own cars, you can say that 75 out of 100 adults own a car in your community.
3. Measuring Change: For example, if the percentage of positive students increased from 20% to 24%, you can say that there was a 4% increase in the proportion of positive students.