Percent Table Calculator
Percent table calculator works out Answer and Part from Whole / base / original value, Table: first percentage and Table: last percentage. The default figures on this page give whole of 200; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
3 steps
- Building 10% to 50% of 200 in steps of 10%: 5 rows.
- Each row multiplies the base by the percentage and divides by 100, e.g. 10% of 200 = 10 x 200 / 100 = 20.
- The last row is 50% of 200 = 100.
Percentage tabletable
| percent | decimal | fraction | value |
|---|---|---|---|
| 10 | 0.1 | 1/10 | 20 |
| 20 | 0.2 | 1/5 | 40 |
| 30 | 0.3 | 3/10 | 60 |
| 40 | 0.4 | 2/5 | 80 |
| 50 | 0.5 | 1/2 | 100 |
Its 7 worked examples are re-run on every release, last on 15 September 2026. What changed
What the percent table calculator calculates
Works out a percentage of a number, what percent one number is of another, the original whole behind a part, the result of increasing or decreasing a value by a percentage, and a full percentage table listing each percentage of a number alongside its decimal and fraction.
How to use this percent table calculator
Enter Whole / base / original value, Table: first percentage, Table: last percentage and Table: step between rows. Answer updates as you type. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Answer, Part and Whole.
The method follows National Institute of Standards and Technology, SI Guide (NIST SP 811) §7.10.2 on percent as the number 0.01 and OpenStax, Prealgebra 2e, Chapter 6 "Percents" (solving percent applications with the basic percent equation).
What you can compare
Change one input at a time to see how it affects Answer, Part and Whole. The inputs you can vary are Whole / base / original value, Table: first percentage, Table: last percentage and Table: step between rows.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
How is percent (%) calculated?
Works out a percentage of a number, what percent one number is of another, the original whole behind a part, the result of increasing or decreasing a value by a percentage. Open “How this is worked out” beside the result to see each step for your own figures.
What information do I need for the percent table calculator?
You need Whole / base / original value, Table: first percentage, Table: last percentage and Table: step between rows. The page opens with default figures that give whole of 200, so you can see the scale before entering your own.
What does this percent table calculator show?
It shows Answer, Part, Whole, Percentage, Percent as a decimal, Percent as a fraction, Amount of change and Value after the change, with the working and any warnings for your entries.
Can I check how the percent table calculator result was calculated?
Yes. The “How this is worked out” section shows the calculation steps, and the sources section identifies the references used for the method.