Determining the percentage that a given number represents in relation to a whole is a fundamental mathematical operation. In the specific instance of 11 being a portion of 20, the calculation involves dividing the part (11) by the whole (20) and then multiplying the result by 100. This computation yields the percentage equivalent of the fraction.
Understanding proportional relationships has broad practical applications across various fields. In education, it aids in interpreting test scores and grading systems. In finance, it is crucial for calculating interest rates, investment returns, and budget allocations. In business, it informs market share analysis, sales target assessments, and profitability margins. Historically, the ability to express proportions as percentages has been essential for trade, taxation, and the fair allocation of resources.