THE FEUTEX TOOLKIT

Online Percentage Converter

Convert percentages online: percent to decimal or fraction, fraction to percent, calculate X% of Y, and percent change from A to B. Fast, simple, copy-ready results.

Mode

Rounding (decimals)

Percent (%)

Example: 12.5% → 0.125

Decimal

Example: 0.075 → 7.5%

Percent (%)

Example: 12.5% → 1/8

Fraction (a/b)

Example: 3/8 → 37.5%

Percent (%)

Number (Y)

Example: 15% of 200 → 30

Start value (A)

End value (B)

Formula: ((B − A) / A) × 100

Output

Privacy: runs locally in your browser. No uploads, no tracking scripts.

How to use

Pick a conversion type, enter your values, then press Convert.

Select a mode (e.g., Percent → Decimal, X% of Y, Percent change).
Enter the required number(s) (fractions like 3/8 are supported where shown).
Click Convert to generate a copy-ready result.

FAQ

How do I convert a percent to a decimal?

Divide by 100. For example, 12.5% becomes 0.125.

How do I convert a decimal to a percent?

Multiply by 100 and add the % sign. For example, 0.075 becomes 7.5%.

Can this convert percentages to simplified fractions?

Yes—use “Percent → Fraction” and it will reduce the fraction (e.g., 12.5% → 1/8).

What formats are supported for fractions?

Use a/b with integers, like 3/8 or -5/2; the denominator cannot be 0.

How do I calculate X% of a number?

Use “X% of Y”; it computes (X ÷ 100) × Y and prints the result.

What is the percent change formula?

Percent change from A to B is ((B − A) / A) × 100; increases show a + sign.

Why is percent change not allowed when A is 0?

Because the formula divides by A, and division by zero is undefined.

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