This math topic focuses on calculating percentages of numbers, specifically using multiples of 10%. It is designed to introduce and reinforce basic concepts of finding 10%, 20%, and 30% of given numbers. Each question provides a base example (e.g., 10% of a number) and asks for a related calculation. The answers are provided in a multiple-choice format, allowing for the application and practice of percentage calculations in a straightforward, introductory manner. Overall, this topic serves as an introduction to understanding and working with percentages.