How to Find the Percent of Increase and Percent of Decrease

The video tutorial explains how to calculate percent change, including both percent increase and decrease. It provides a formula for calculating percent change and emphasizes that the amount of change is always positive. The tutorial includes several examples, such as a snake's growth, a dog's weight loss, a temperature drop, a bike sale, and a sweatshirt markup, to illustrate the concept. Students are encouraged to practice calculating percent change using the provided examples.

How would you express a decrease in percent rather than using a negative number?

What is the percent of change if a bike's price drops from $270 to $189?

Explain the concept of markup in relation to percent of change.