Decimals & Percents
Understand decimals, conversions, and percentages
Topics
Decimal Basics
Understanding place values in decimals
Conversions
Convert between fractions and decimals
Decimal Operations
Calculate with decimals
Percentages
Work with percents and percent problems
Decimals and percents are essential for understanding parts of numbers in everyday contexts. From reading prices and calculating tips to understanding statistics and interest rates, these concepts appear constantly in adult life. This category bridges the gap between fractions and real-world numerical applications.
We begin with decimal place values and their relationship to fractions. You will learn to perform all operations with decimals, estimate results, and convert fluently between decimals, fractions, and percents. Each concept builds on the previous, creating a solid foundation for financial literacy and data interpretation.
Our lessons feature real-world scenarios like shopping discounts, tax calculations, and grade percentages. Interactive visualizations help you see the connection between different number representations, making these abstract concepts concrete and practical.
What Students Will Learn
- Understand decimal place values and their meaning
- Convert between fractions, decimals, and percents
- Perform operations with decimal numbers accurately
- Calculate percentages including increase, decrease, and of a number
- Apply percent concepts to real-world problems like discounts and tips
- Estimate with decimals to check reasonableness
- Understand and calculate simple and compound interest basics
Frequently Asked Questions
What is the difference between decimals and percents?
Decimals and percents are different ways to write the same value. A percent is always out of 100, while decimals show parts of 1. For example, 50% = 0.50 = 1/2.
Why are percents important?
Percents are used everywhere: discounts, tips, taxes, interest rates, test scores, statistics, and more. Understanding percents is essential for financial literacy.
How do I convert between them?
To convert percent to decimal, divide by 100 (move decimal 2 places left). To convert decimal to percent, multiply by 100 (move decimal 2 places right).