Percent concentration is a way to express the amount of a substance in a solution compared to the total volume of that solution. It is calculated by dividing the mass of the solute (the substance being dissolved) by the total volume of the solution, then multiplying by 100. For example, if you have 5 grams of salt dissolved in 100 milliliters of water, the percent concentration of salt is 5%. This measurement is commonly used in chemistry and biology to describe solutions, such as saline solutions or sugar water. Understanding percent concentration helps in preparing solutions with specific properties and ensures accurate results in experiments and applications.