Percentages and Percentage Change

The video tutorial explains the concept of percentages, emphasizing their conversion to fractions and decimals. It covers methods for calculating percentage increases and decreases using the unitary and decimal methods. The tutorial introduces multiplying factors for simplifying these calculations and concludes with steps to calculate percentage change, useful for determining profit or loss.

Explain the process of calculating a percentage change.

What is the significance of calculating percentage increases and decreases in real-world applications?