Percentage of a Percentage Calculator

Calculate a percentage of a percentage instantly. Enter both percentages to get the exact combined result, with the formula and step-by-step explanation.

Result

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The first percentage of the second percentage. For example, 20% of 50% is 10%.

What is a percentage of a percentage calculator?

A percentage of a percentage calculator finds one percentage of another percentage. It answers questions like: what is 20% of 50%? Or if 30% of customers use a feature, and 40% of those are on mobile, what percentage of all customers are mobile feature users? The answer is 12%.

The formula is (percentage A / 100) × percentage B. The first percentage is converted to a decimal — 20% becomes 0.20 — and then multiplied by the second percentage. The percentage of a percentage calculator applies this formula instantly and shows the combined result, removing any chance of arithmetic slips.

This calculation comes up in surveys, funnel analysis, conditional probabilities, and multi-stage discounts. Because each percentage is relative to a different baseline, multiplying them gives the share relative to the original whole. A reliable calculator lets you chain these steps without losing track of the denominators.

How to calculate a percentage of a percentage

  1. 1

    Enter the first percentage

    Type the percentage that will be taken of the second, such as the 20 in "20% of 50%". This is the share you want to apply.

  2. 2

    Enter the second percentage

    Type the percentage the first one is taken of, such as the 50 in "20% of 50%". This is the base share.

  3. 3

    Read the result

    The calculator converts the first percentage to a decimal, multiplies by the second, and shows the combined percentage with the working.

Why use this percentage of a percentage calculator?

Instant and accurate

No decimal conversion or mental arithmetic. Get the exact percentage of a percentage the moment both values are entered.

Handles chained shares

Surveys, funnels, conditional probabilities, multi-stage discounts — any case where one percentage applies to another is handled cleanly.

Transparent formula

Every result is built on the same simple formula, so you can verify the math and reuse the method for future problems.

FAQ

Frequently Asked Questions

Quick answers to common questions about percentage calculations.

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