This math topic focuses on calculating the percent growth of money, specifically with problems that involve adding a 20% interest rate to various principal amounts. It teaches students how to compute the final amount of money after it has increased by a given percentage, facilitating understanding of percentage growth calculations in the context of interest and principal sums. The exercises are structured as multiple-choice questions, helping students apply their knowledge to real-world financial scenarios involving simple interest calculations.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.

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Percent growth of money (principle and interest) (10% multiples)

Complete these online problems with 80% or 4 correct answers in a row. Results are immediate.


Calculate the final amount when it changes by a percentage

20% interest on $15 principle

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