Simple Interest: The Foundation of Financial Calculations

Unlock the power of simple interest calculations to understand loan costs, savings growth, and investment returns. Master this essential financial skill for smarter money management and informed decision-making.

What You'll Learn

Define interest as the cost of borrowing money and identify key terminology

Apply the simple interest formula I = P × R × T to calculate interest charges

Convert interest rates from percentages to decimals for accurate calculations

Calculate total repayment amounts by adding principal and interest together

Determine net profit by subtracting expenses from income in business scenarios

What You'll Practice

Calculating interest on loans with varying principals and rates

Finding total repayment amounts after one or more years

Converting annual percentage rates to decimal form

Solving multi-year interest problems with different time periods

Computing net profit from borrowed money in real-world scenarios

Why This Matters

Simple interest is essential for understanding loans, credit cards, and savings accounts you'll encounter throughout life. Whether you're borrowing money for college, a car, or starting a business, knowing how to calculate interest helps you make smart financial decisions and avoid costly surprises.

Before You Start — Make Sure You Can:

Representing percents Percents, fractions, and decimals Percent of a number Adding and multiplying percents

This Unit Includes

6 Video lessons

Practice exercises

Learning resources

Skills

Simple Interest

Interest Rate

Principal

Percentages

Decimal Conversion

Financial Literacy

Net Profit

MB Curriculum Aligned