This math topic focuses on calculating percentages, specifically finding what percent one number is of another using 10% multiples. Each problem presents two numbers, and the task is to determine what percentage the first number represents relative to the second. For example, students might be asked 'What percent is 21 out of 70?' Possible answers are provided in a multiple-choice format, enhancing understanding of basic percentage calculations. This exercise is introductory and cultivates familiarity with percentages in various practical scenarios.