Calculating a percentage of a whole is a fundamental mathematical operation with broad applications. In the specific scenario of finding twenty percent of four hundred thousand, the result is eighty thousand. This calculation involves multiplying the whole number by the decimal equivalent of the percentage (400,000 x 0.20 = 80,000). This process is applicable to various contexts requiring proportional assessments.
Understanding percentage calculations is vital in finance, business, and everyday life. Businesses use it to determine profit margins, discounts, and sales tax. Financial institutions use percentages to calculate interest rates on loans and investments. In personal finance, it aids in budgeting, savings, and understanding debt repayment. Its prevalence underscores the practical importance of mastering this mathematical concept.