This math topic helps learners practice calculating percentage reductions of numbers, specifically focusing on multiples of 10%. The problems involve determining the total cost of items after discounts of 10%, 20%, and 30% have been applied. This is a practical application of introductory concepts in percentages, framed within the context of straightforward, real-life scenarios involving price calculations after discounts. Each problem comes with multiple-choice answers, enhancing students' abilities to compute and select accurate results efficiently.