Percentages

Understanding Percentages

Percentages are a way of expressing fractions and decimals as parts of 100. The word "percent" means "per hundred," making percentages a powerful tool for comparing quantities and understanding proportions.

What is a Percentage?

A percentage represents a fraction with a denominator of 100. For example, 25% means 25 out of 100, or 25/100, which equals 0.25 as a decimal.

Converting Between Percentages, Fractions, and Decimals

Master the techniques for converting between these three forms. Learn shortcuts and patterns that make these conversions quick and easy.

Calculating Percentages

Learn how to find a percentage of a number, how to find what percentage one number is of another, and how to find the whole when given a part and its percentage.

Percentage Increase and Decrease

Understand how to calculate percentage changes, including increases and decreases. This is essential for understanding growth rates, discounts, and many real-world applications.

Real-World Applications

Explore how percentages are used in everyday life, including sales tax, tips, discounts, interest rates, and statistics.