A quarter is a fraction that represents one part of four equal parts of a whole. It is written as 1/4, where the number 1 is the numerator (the part we have) and the number 4 is the denominator (the total number of equal parts). This means that if you divide something into four equal sections, one of those sections is a quarter. In everyday life, quarters are commonly used in various contexts, such as dividing a pizza or measuring time. For example, a quarter of an hour is 15 minutes, and a quarter of a dollar is 25 cents, which is also the value of a U.S. coin known as a quarter.