Percentage calculator

Calculating percentages is a fundamental mathematical concept used to express a portion of a whole as a fraction of 100. Percentages are often used to compare relative values or express proportions. Here's how you can calculate percentages:

Understand the Basics:

• Percentages are represented using the symbol "%".
• 100% represents the whole or the total amount.
• When you want to calculate a percentage, you're essentially finding a part of the whole as a fraction of 100.

Formula:

The formula to calculate a percentage is:

Percentage = (Part / Whole) * 100

• "Part" refers to the portion of the whole that you want to express as a percentage.
• "Whole" refers to the total or the whole amount.

Steps to Calculate:

Let's say you want to calculate the percentage of a certain value in relation to a total value.

Example: You scored 75 marks out of 100 in a test. What is your percentage score?

• - Plug into the formula: Percentage = (75 / 100) * 100
• - Calculate: Percentage = 0.75 * 100 = 75%



So, your percentage score is 75%.

Converting Decimals to Percentages:

If you have a decimal value and you want to express it as a percentage, multiply the decimal by 100 and add the "%" symbol.

Example: You scored 75 marks out of 100 in a test. What is your percentage score?

Example: Convert 0.625 to a percentage.

• Multiply by 100: 0.625 * 100 = 62.5
• Add the "%" symbol: 62.5%



So, 0.625 is equivalent to 62.5%.

Calculating Percentage Increase or Decrease:

To calculate the percentage increase or decrease between two values, you can use the following formula:

Percentage Change = [(New Value - Old Value) / Old Value] * 100

Example: Convert 0.625 to a percentage.

• If the result is positive, it's a percentage increase.
• If the result is negative, it's a percentage decrease.



Remember, percentages are a versatile tool for expressing proportions in various contexts, such as finance, statistics, and everyday life. Practicing calculations involving percentages will help you become more comfortable with using them in different scenarios.