Percentage is one of the most important chapters. Percentage is the backbone of the calculation involved in the real life as well as exams. It is necessary to know the clear concept of percentage as it plays vital role in not just quant, logical reasoning but also data interpretation and aptitude. On an average 5 - 6% or 2 - 3 questions asked directly from percentage in every Examination. To crack CAT 2018, it is important to understand the concept of percentages in detail.