Proportionaländerung

Proportionaländerung, often translated as proportional change or percentage change, is a fundamental concept in mathematics and statistics used to express the relative difference between two values. It quantifies how much a quantity has changed in relation to its original value, usually as a percentage. The formula for calculating proportional change is: ((New Value - Original Value) / Original Value) * 100%. A positive result indicates an increase, while a negative result indicates a decrease.

This metric is widely applied in various fields. In finance, it's used to track stock price movements, investment returns, and economic growth rates. For example, if a stock price increases from $100 to $120, the proportional change is (120-100)/100 * 100% = 20%. In science, it helps in measuring the accuracy of experiments or the extent of physical changes, such as the expansion of materials under heat. Demographers use proportional change to analyze population growth or decline over time. It provides a standardized way to compare changes across different scales, making it easier to understand the significance of a variation. Unlike absolute change, which simply states the difference in units, proportional change offers context by relating that difference to the starting point.

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