This lesson reviews percentages and ratios and their application to real-world problems. It also examines proportions and rates of change. Percentages A percent or percentage represents a fraction of some quantity. It is an integer or decimal number followed by the symbol %. The word percent means “per hundred.” For example, 50% means 50 per 100. This is equivalent to half, …
This lesson introduces how to add and subtract fractions. Adding a Fraction to a Fraction Fractions with the same denominator are called like fractions. To add a fraction to a fraction with like denominators, simply add the numerators. For example, . Sometimes, the final solution reduces. For example, . The fraction reduces to . A …
This lesson introduces how to multiply and divide fractions. Multiplying a Fraction by a Fraction The multiplication of fractions does not require changing any denominators like adding and subtracting fractions do. To multiply a fraction by a fraction, multiply the numerators together and multiply the denominators together. For example, is , which is . KEEP …
This lesson introduces the basics of decimals and fractions. It also demonstrates changing decimals to fractions, changing fractions to decimals, and converting between fractions, decimals, and percentages. Introduction to Fractions A fraction represents part of a whole number. The top number of a fraction is the numerator, and the bottom number of a fraction is the denominator. The numerator …
This lesson describes the process of multiplying and dividing numbers and introduces the order of operations, which governs how to evaluate expressions containing multiple arithmetic operations. Multiplication Addition can be tedious if it involves multiple instances of the same numbers. For example, evaluating 29 + 29 is easy, but evaluating 29 + 29 + 29 …
This lesson introduces the concept of numbers and their symbolic and graphical representations. It also describes how to add and subtract whole numbers. Numbers A number is a way to quantify a set of entities that share some characteristic. For example, a fruit basket might contain nine pieces of fruit. More specifically, it might contain three apples, …
