#Foundation скачать в хорошем качестве

#Foundation

Percentage change is one of the most important and scoring topics in Maths. It helps us understand how much a value increases or decreases compared to its original value. From profit & loss to population growth, from exam marks to business discounts — percentage change is used everywhere in real life. In this topic, we learn: ✔️ How to calculate percentage increase ✔️ How to calculate percentage decrease Successive percentage change is the next level. When a value increases or decreases more than once, we apply percentage step by step. Many students make mistakes by simply adding percentages — but the correct method is multiplying the changes. 🔹 Important Formula: If a value increases by a% and then by b%, Net change = a + b + (ab/100)% This concept is very useful for: • Competitive exams • School exams (Class 6–10) • SSC, Banking & other government exams......