Determining a percentage of a given number is a fundamental mathematical operation with wide-ranging applications. In the specific instance of calculating ninety percent of seventy-five, the process involves converting the percentage to its decimal equivalent and multiplying it by the base number. The decimal equivalent of ninety percent is 0.90. Therefore, the calculation would be 0.90 multiplied by 75, resulting in a value of 67.5.
Understanding percentage calculations is crucial across various disciplines, including finance, statistics, and everyday life. In finance, it is used to calculate interest rates, discounts, and investment returns. In statistics, it helps in understanding proportions and distributions. In everyday situations, it aids in calculating tips, sales tax, and understanding survey results. Historically, the concept of percentages has evolved from earlier methods of representing fractions and proportions, providing a standardized and readily understandable method of expressing relative values.