This topic focuses on the skill of calculating percentages of a number, specifically using 5% increments to find what various percentage tips would be. Problems involve identifying accurate results for tips at percentages like 25%, 35%, 45%, 55%, 85%, and 95%. Each problem presents multiple choice answers, encouraging practice in not only percentage computation but also decision-making among possible results. The inclusion of picture questions likely enhances understanding through visual aids. This forms part of an introduction to understanding percentages more broadly.