Percentage Calculator UK
Our free percentage calculator instantly computes percentage values, increases, decreases, and differences. From calculating a VAT amount to working out a discount in a UK shop, this tool handles it all in seconds.
What is X% of Y?
X is what % of Y?
Percentage Increase/Decrease
How Percentages, Increases, and Decreases Are Calculated
This tool handles three common percentage operations. (1) 'What is X% of Y?': Result = (X ÷ 100) × Y. (2) 'X is what % of Y?': Result = (X ÷ Y) × 100. (3) 'Percentage change from X to Y': Change = ((Y − X) ÷ X) × 100. Inputs: two numeric values and the desired operation. Outputs: the percentage result, with positive results indicating an increase and negative results a decrease.
Frequently Asked Questions
How do I calculate a percentage of a number?
To find X% of a number Y, multiply Y by X and divide by 100. For example, 15% of £240 = (240 × 15) ÷ 100 = £36. Our calculator handles this instantly without manual working.
How do I calculate a percentage increase or decrease?
Percentage change = ((New Value − Old Value) ÷ Old Value) × 100. A positive result indicates an increase and a negative result indicates a decrease. For example, a price rising from £80 to £100 is a 25% increase: ((100 − 80) ÷ 80) × 100 = 25%.
How is VAT calculated as a percentage in the UK?
UK VAT at 20% is calculated by multiplying the net (ex-VAT) price by 0.20. To find the net from a gross price, divide by 1.20. For example, a gross price of £60 ÷ 1.20 = £50 net, with £10 VAT. Our percentage calculator can handle both of these quickly.
What percentage is X of Y?
To find what percentage X is of Y, divide X by Y and multiply by 100. For example, if 35 students out of 140 passed an exam: (35 ÷ 140) × 100 = 25%. This also applies when comparing salaries, prices, or any two quantities.
How do I calculate a discount percentage in a UK shop?
To calculate a discount percentage, use: Discount % = ((Original Price − Sale Price) ÷ Original Price) × 100. For example, a jacket reduced from £120 to £84: ((120 − 84) ÷ 120) × 100 = 30% off. Our calculator can work this out instantly for any UK retail scenario.