This math topic focuses on calculating percentage reductions of numbers, specifically in multiples of 5%. It includes determining the new value of numbers after they have decreased by percentages such as 5% or 15%. The problems require students to apply their understanding of basic percentage calculations to find the reduced amounts from original numbers like 60, 80, 100, 40, 20, and more. Each problem offers multiple choice answers, enhancing students' skills in percentage reductions and testing their ability to correctly compute the final values after specified percentage decreases.
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Calculate the final number when it changes by a percentage
15% less than 100