Percentage Calculator
Five common percentage questions in one place. Fill in the numbers and the answer appears as you type.
Este conteúdo está em inglês.
What is a percentage of a number?
What percentage is one number of another?
What is the percentage change?
Increase or decrease a number by a percentage
What number is this a percentage of?
Exemplos resolvidos
Finding 15 percent of 240
Percentage 15 and value 240 in the first row
15% of 240 is 36.
The answer is the value multiplied by the percentage divided by 100, so 240 times 0.15 is 36.
Working out a price rise
From 80 to 100 in the change row
From 80 to 100 is an increase of 25%.
Change is the difference divided by the starting value, so 20 divided by 80 gives 25 percent; going back from 100 to 80 would be a 20% fall.
Sobre Percentage Calculator
A percentage calculator answers the questions that come up in shopping, budgeting, studying and work. Find a percentage of a number, see what percentage one number is of another, measure the change between two values, apply an increase or decrease, or work backwards to find the original number. All five calculations sit on one page.
Answers update as you type, so you can try different figures quickly. Results are rounded to a maximum of six decimal places and shown with thousands separators. If an input would lead to dividing by zero, a short message explains what to change. Everything is laid out in separate cards, so each question is easy to find.
Como usar Percentage Calculator
- Find the card that matches your question.
- Type the two numbers into the boxes.
- Read the answer, which appears underneath as you type.
- Change a figure to compare another scenario.
Usos comuns
- Working out a discount or a sale price
- Adding or removing VAT from a price
- Measuring the rise or fall in prices, grades or sales
- Splitting a total into shares expressed as percentages
Perguntas frequentes
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by one hundred. For example, 15% of 200 is 200 times 15 divided by 100, which is 30. In the first card, enter 15 and 200 and the answer appears straight away.
How do I work out percentage change?
Subtract the old value from the new value, divide by the old value and multiply by one hundred. Going from 80 to 100 is a rise of 25%. Going from 100 back to 80 is a fall of 20%, because the starting point is different.
How do I add or take off a percentage?
To increase a number by a percentage, multiply it by one plus the percentage as a decimal, so adding 20% means multiplying by 1.2. To decrease it, multiply by one minus the percentage. The fourth card shows both results at once.
How do I find the original number?
If you know a number and the percentage it represents, divide the number by the percentage as a decimal. If 30 is 15% of a number, divide 30 by 0.15 to get 200. The last card does this for you and shows the result.
What is the difference between percent and percentage points?
Percentage points describe the simple gap between two percentages. A rate that moves from 10% to 12% has risen by two percentage points. In relative terms it has risen by 20%, because two is a fifth of ten. The change card gives the relative figure.