Math Calculators, Lessons and Formulas
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Simple interest is calculated solely on the amount initially invested.
This calculator can help you deal with many different kinds of simple interest problems.
The calculator prints an easy-to-follow, step-by-step explanation.
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Welcome to MathPortal. This website's owner is mathematician Miloš Petrović.
I designed this website and wrote all the calculators, lessons, and formulas.
If you want to contact me, probably have some questions, write me using the contact form or email me on