This topic focuses on the skill of calculating the 10% growth of a number, specifically in the context of adding a tip. Presented as a math introduction to percentages, students are given a base amount and are required to determine the correct sum after a 10% increase is added. This basic introduction to percentages is suited for young learners at an introductory level, which combines mathematical calculations with real-world application scenarios such as restaurant tipping. Each question provides a scenario and multiple choice answers to select from.