This math topic focuses on calculating the increased value of a number after adding a certain percentage to it, specifically using multiples of 10% like 60%, 70%, 80%, and 100%. Each question presents a base number (e.g., 40, 90, 60) and asks to determine the new value after increasing by the specified percentage. The answers are provided in a multiple-choice format. This set of problems challenges learners to apply their understanding of percentage growth calculations as part of a broader unit on percentages.