Determining a proportional value of a given number is a common mathematical operation. Specifically, finding 30% of 130 involves calculating a fraction of the whole. This is achieved by converting the percentage to a decimal (0.30) and multiplying it by the original number (130), resulting in a value of 39. This calculation demonstrates a fundamental application of percentages in quantitative analysis.
Understanding how to derive proportional values is essential in various contexts, including financial planning, statistical analysis, and everyday problem-solving. For example, in a retail setting, calculating discounts requires proficiency in percentage calculations. Historically, percentages have been used to represent proportions and have become an integral part of commerce and data interpretation.