Quantity refers to the amount or number of something. It can be measured in various units, such as liters for liquids, grams for weight, or pieces for countable items. Understanding quantity helps in comparing, analyzing, and making decisions based on numerical data. In everyday life, we encounter quantity in many forms, like the number of apples in a basket or the distance in kilometers to a destination. Accurate measurement of quantity is essential in fields like science, economics, and cooking, where precise amounts can significantly impact results and outcomes.