# Percent Problems involving Simple Interest

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

What is the Simple Interest Formula?
The Simple Interest Formula is
I = Prt
where I is interest, P is the principal or starting amount, r is the interest rate per year and t is the time the money is invested or borrowed in years.

How to solve percent problems involving the Simple Interest Formula?
Learn how to figure out simple interest and sales tax.

The root of calculating interest income is found in the formula that is described as I equals PRT.
Understanding Simple Interest and Compound Interest

Try the free Mathway calculator and problem solver below to practice various 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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