Percentage Calculator
Solve any percentage problem in seconds
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What is 17.5% of 340? What is 62 as a percentage of 185? And what was the original price if 45 is what you paid after 25% off? The Percentage Calculator handles all three shapes of that question, which is more than most calculators on a phone will do.
Short answer: The Percentage Calculator is a free tool on EizTools that solves any percentage question written in plain words. It covers increases, decreases, reverse percentages and the change between two numbers, with the working shown when you want it.
What is Percentage Calculator?
It takes percentage questions as sentences rather than fields. Type what you need and the Percentage Calculator works out which calculation you actually meant, then returns the answer with as much working as you ask for.
Every Percentage Question In One Box
| What you ask | What comes back |
|---|---|
| What is 17.5% of 340? | The value of the percentage |
| 62 is what percent of 185? | The percentage one number is of another |
| Increase 1,240 by 8% | The new figure after the rise |
| 45 after 25% off, what was the original? | The reverse calculation back to the starting price |
That fourth one is where people get stuck, because dividing by 0.75 is not the instinct. Working backwards from a discounted price is a different sum from taking a percentage off, and asking in plain words means you do not have to remember which.
Strengths
- Handles reverse percentages, which trip up most quick mental maths
- Understands the question from a sentence, so no field labels to decode
- Shows working when you want to check the method rather than the number
Limits
- Ambiguous wording gives an answer to the wrong question, so be specific
- Percentage points and percentages are different things, and you have to say which you mean
- The arithmetic comes from an AI model, so verify anything that matters
Precision And Output Style
For a quick answer, Output Style set to Answer Only with Round Result on gives you the figure and nothing else. For anything you are checking or explaining, switch to Steps + Answer. Precision runs from Whole Number to Exact, and Whole Number is the right choice for headcounts, stock and anything you cannot have a fraction of.
How Does Percentage Calculator Work?
A tutor is preparing a worked example on price rises.
- Type the question: "a 340 fee rises by 17.5%, then falls by 10%, what is the final figure and the overall change?"
- Choose the AI model you want from the selector.
- Choose Percentage as the Calculation Type, ask for Steps + Answer, and leave precision at 2 Decimals.
- Switch on both Show Steps and Explain.
- Generate, then read the overall change, which is not the difference between the two percentages.
- Copy the working into your notes, or download it as TXT.
Useful habit Ask for the overall change whenever two percentages apply in sequence. A rise of 17.5% followed by a fall of 10% does not return you to where you started, and the answer surprises people every time.
Tips Worth Knowing
- Say "percentage points" when you mean the gap between two rates, such as 4% to 6%
- Name the order when two changes apply, since the sequence affects the result
- Use Whole Number precision for people, seats or stock, where decimals make no sense
- Ask for the reverse calculation explicitly rather than hoping it is inferred
EizTools keeps its tools free and open with no account, each one built for a single job, with several AI model families available from the same selector. Percentage questions rarely arrive alone, and the tool library holds the calculators and planners that usually pick up where one number leaves off.
Frequently Asked Questions
Can the Percentage Calculator work backwards from a final price?
Yes. Ask it directly, such as "45 after a 25% discount, what was the original", and set Output Style to Steps + Answer so you can see the division it used.
What is the difference between percent and percentage points?
Moving from 4% to 6% is a rise of two percentage points, which is a 50% increase. Say which you mean in the prompt, because the two answers are very different.
Does it handle percentage change between two numbers?
Yes. Give both figures and ask for the change. It returns the direction and the size, and Show Steps reveals whether the original or the new value was used as the base.
Is it suitable for classroom use?
It works well for showing method. Set Output Style to Explanation and Detail Level high, and the answer reads as a short walkthrough rather than a result to copy down.
Percentages are simple until two of them stack, or the question runs backwards. Ask in the words you would use out loud, turn the working on when it matters, and check the overall change rather than adding the labels together.
Sabir Bepari
Founder of EizTools and a passionate AI enthusiast dedicated to building practical, user-friendly AI tools that simplify everyday tasks.
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