This math topic focuses on calculating the decrease of a number by a certain percentage, specifically in multiples of 10%, such as 10%, 20%, and 30%. The problems ask to compute the final value after reducing given numbers by these specified percentages. The questions are a part of an introductory unit on percentages and are designed to develop computational skills involving basic reductions by percentages. Each problem is presented with multiple choice answers, enhancing problem-solving abilities in percentage calculations.

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