SAMIR
Calculators

Percentage Calculator

Calculate percentages, percentage change, and percentage of a number with ease.

What is X% of Y?

What is
%
of
Result--

X is what % of Y?

is what % of
?
Result--

Percentage Change

From
To
Change--

How to Calculate Percentages

Percentage literally translates to "per 100" and is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign %.

Common Percentage Formulas

1. Finding the percentage of a number (What is P% of V?)

To find the percentage of a specific value, you multiply the value by the percentage, and then divide by 100.

Result = (P / 100) * V
Example: 20% of 50 = (20 / 100) * 50 = 10

2. Percentage difference / change (X to Y)

When you want to calculate the percentage increase or decrease between two numbers, you compare the absolute difference to the original starting value.

Change = ((New Value - Old Value) / Old Value) * 100
Example: Change from 40 to 50 = ((50 - 40) / 40) * 100 = 25% Increase

Common Use Cases

  • Retail & Shopping: Quickly calculating the final price of an item after a 30% discount is applied.
  • Finance & Investing: Determining the absolute yield percentage of a stock portfolio over a 12-month period based on starting and ending balances.
  • Business: Calculating profit margins based on wholesale vs retail pricing.