This article is about how to calculate the percentage decrease. Percentage change is a fundamental tool in finance that provides valuable insights into the performance, volatility, and risk of financial instruments and helps guide investment decisions.
How to Calculate the Percentage Decrease?
To calculate the percent decrease, you can use the following formula:
Percent Decrease = [(Original Value - New Value) / Original Value] x 100
Here's a step-by-step guide on how to calculate the percent decrease:
- Determine the original value (the starting value or the value before the decrease).
- Determine the new value (the value after the decrease).
- Subtract the new value from the original value.
- Divide the result by the original value.
- Multiply the quotient by 100 to get the percentage.
Let's take an example to illustrate the calculation. Suppose you had an original value of $100 and it decreased to $80. To calculate the percent decrease:
Percent Decrease = [(100 - 80) / 100] x 100
= (20 / 100) x 100
= 0.2 x 100
= 20%
So, in this example, the percent decrease is 20%.
How Is Percentage Change Used in Finance?
Percentage change is a commonly used concept in finance to measure the relative change in values over time. It helps investors, analysts, and financial professionals assess the performance and volatility of various financial instruments, such as stocks, bonds, and indices. Here are some ways percentage change is used in finance:
Stock Market Analysis: Percentage change is frequently used to analyze stock prices. Daily, weekly, or monthly percentage changes can provide insights into the market's volatility and the relative performance of individual stocks or indices.
Portfolio Performance: Investors and fund managers use percentage change to evaluate the performance of their investment portfolios. By comparing the percentage change of a portfolio against benchmarks or other investment options, they can gauge the relative success or underperformance of their investments.
Return on Investment (ROI): Percentage change is vital in calculating investment returns. ROI measures the percentage change in the value of an investment over a specific period. It helps investors determine the profitability and efficiency of their investment decisions.
Risk Assessment: Percentage change is used to assess the volatility and risk associated with financial instruments. Standard deviation, a measure of volatility, is calculated using percentage changes in price or returns. It helps investors understand the potential fluctuations in the value of an investment.
Economic Indicators: Percentage change is utilized in various economic indicators to assess economic growth, inflation, and other macroeconomic factors. For example, the GDP growth rate measures the percentage change in a country's economic output over a specific period.
Comparative Analysis: Percentage change is employed to compare different financial metrics, such as revenue growth, earnings growth, or market share change, among companies within an industry. It allows investors and analysts to identify trends, relative strengths, and weaknesses of various companies.
Bottom Line
In this article, we will discuss how to calculate the percentage decrease. Percentage change is used to track the change in a number over time. That number can be anything from the price of a stock to the amount of money made by a business.




















