Porcentajes commonly known as percentages, are a way to express a part of a whole as a fraction of 100. They are widely used in daily life, from calculating discounts, interest rates, and tax, to analyzing data in business and education. Understanding porcentajes helps simplify comparisons between different quantities and makes interpreting statistics more intuitive. For example, saying 25% is equivalent to saying 25 out of every 100 parts. Mastery of porcentajes is essential for practical math, finance, and data analysis.