Videos, worksheets, and solutions to help Grade 8 students learn how to solve percent problems involving simple interest.

Simple Interest = principal × rate × time

I = P × r × t

This video makes clear the difference between simple interest and compound interest.

Rotate to landscape screen format on a mobile phone or small tablet to use the **Mathway** widget, a free math problem solver that **answers your questions with step-by-step explanations**.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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