Percentage Calculator
Find the percentage of a number, a percentage increase or decrease, or the ratio between two numbers.
What is Y% of X?
This tool is for information only. For important figures such as tax, interest or profit margin, check the result with a specialist.
Online Percentage (%) Calculator Tool
Use this tool to find a percentage of an amount, how much a value has gone up or down in percent, or the percentage difference between two numbers. It helps with shopping discounts, money matters and schoolwork.
How to Calculate Percentages? The Basic Logic
A percentage is a share of a whole divided into 100 equal parts. To find B% of a number A, multiply A by B and divide the result by 100. For example, 15% of 200 TL is (200 × 15) ÷ 100 = 30 TL.
Percentage Increase and Decrease (Discount) Calculation
Price changes are the most common use. The 'Percentage Increase' formula is used for price rises or inflation, and 'Percentage Decrease' for discounts or promotions.
Commercial and Everyday Uses of Percentage Calculation
In business, profit margins, taxes (VAT, withholding) and bank interest rates are all percentage calculations. In everyday life you use them to check a sale price at the shop or to work out a tip.
Key Uses of Percentage Calculation
Discounts, taxes, interest and inflation are all worked out with percentages. Finding a sale price, a salary after a raise or the VAT on a purchase are percentage operations. They are common, and still easy to get wrong.
Discount Rate Calculation Formula
If you know the original price and the discount rate, the new price is: New Price = Original Price × (1 − Discount Rate ÷ 100). For example, a 500 TRY item with a 20% discount costs 400 TRY. To get the original price back from a discounted one: Original Price = Discounted Price ÷ (1 − Discount Rate ÷ 100).
Percentage Change: Increase and Decrease Rate
The percentage change between two values is: Change (%) = (New Value − Old Value) ÷ Old Value × 100. Stock returns, inflation and sales growth are measured this way. A positive result is an increase, a negative one a decrease. For example, a price going from 100 to 130 is a 30% increase.
Using Percentages in VAT and Tax Calculations
The standard VAT rate in Turkey is 20%. To get the VAT-inclusive price from the price before VAT, multiply by 1.20. To go the other way, divide by 1.20. Some products and services have reduced rates such as 1% or 10%, so check which rate applies before you calculate.
How to Calculate Compound Percentage Change?
Percentage changes applied one after another cannot simply be added. If a value rises 50% and then falls 50%, it does not return to where it started; it ends up 25% lower. To get the total change, multiply the factors for each period together and subtract 1. Compound growth in finance and economics is calculated this way.