Warm Up
You will be asked to evaluate the percentage of a number mentally. Sometimes, a visual is helpful to do this. If needed, use the GeoGebra activity to help you determine the requested values. Then, look for a pattern that can be used to describe how to find the percentage of any number.
What is 25% of 200?
50
What is 12% of 200?
24
What is 8% of 200?
16
How would you determine % of ?
Compare your answer:
- Change the percentage to a decimal and multiply it by 200.
- Since percent means “per hundred” and there are two hundreds, the percentage is multiplied by two.