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  Porcentajes: qué son, cómo calcularlos y ejercicios resueltos Español | English Los porcentajes forman parte de las matemáticas que utilizamos con frecuencia para comparar cantidades, expresar descuentos, analizar aumentos, interpretar datos y resolver problemas de la vida cotidiana. Un porcentaje representa una cantidad respecto de un total dividido en cien partes iguales. Por eso, comprender los porcentajes implica relacionar tres ideas fundamentales: una cantidad total, una parte de esa cantidad y una proporción expresada sobre 100. Aprender a calcular porcentajes no consiste únicamente en memorizar una fórmula. Es necesario comprender qué representa el porcentaje y reconocer qué dato conocemos y cuál necesitamos encontrar. Esta interpretación permite resolver desde operaciones sencillas hasta problemas de aumentos, descuentos, impuestos, calificaciones y variaciones porcentuales. Idea fundamental: un porcentaje indica cuántas partes de c...

  Ratios and Proportions: What They Are, How to Solve Them, and Exercises Español | English Ratios and proportions are fundamental mathematical concepts because they allow us to compare quantities and establish relationships between them. They appear in a wide variety of situations, such as comparing prices, interpreting scales, preparing mixtures, calculating quantities, and solving problems involving different measurements. A ratio expresses the relationship between two quantities through a comparison. A proportion, on the other hand, establishes an equality between two ratios. Although these concepts are closely related, they do not mean exactly the same thing. In this article, you will learn what a ratio is, what a proportion is, how to represent and simplify ratios, how to solve proportions, what direct and inverse proportionality are, and how to use the rule of three . You will also find examples and exercises solved step by step. What Is a Mathematical Ratio? A ...

  Decimal Numbers: What They Are, How to Read Them, Operations, and Exercises Español | English Decimal numbers allow us to represent quantities that include a whole-number part and a part smaller than one. They are fundamental for expressing measurements, prices, lengths, masses, amounts of money, and many other situations in everyday life and mathematics. Understanding decimal numbers is not simply a matter of learning how to read them. It is also necessary to recognize the place value of each digit, compare quantities, convert fractions into decimals, and correctly perform operations such as addition, subtraction, multiplication, and division. In this article, you will learn what decimal numbers are, how to read them, what the place value of their digits is, how to compare them, how to round them, and how to perform operations with them . You will also find examples and solved exercises to reinforce your learning. What Are Decimal Numbers? A decimal number is a num...