Decimal to Percent Calculator
Convert decimals to percentages instantly
How to Convert Decimal to Percent
Take your decimal number (e.g., 0.75)
Multiply it by 100 (0.75 × 100 = 75)
Add the percent sign (%) to get 75%
Shortcut Method:
Move the decimal point 2 places to the right and add a percent sign.
Example: 0.35 → 35% (decimal moved two places right)
Conversion Examples
Decimal to Percent Calculator
Use this Decimal to Percent Calculator to quickly convert any decimal number into a percentage. Simply enter a decimal value, and the calculator will multiply it by 100 and add the percent sign (%), giving you the equivalent percentage instantly.
Explore more tools like this in our main Math Calculators section, where you can find helpful online calculators for various mathematical conversions and problem-solving.
What is a Decimal to Percent Conversion?
A decimal to percent conversion is the process of expressing a decimal number as a percentage. Since “percent” literally means “per 100,” converting a decimal involves multiplying the number by 100.
Formula:
Decimal × 100 = Percentage
Then, simply add the percent symbol (%) to represent the value as a percentage.
How to Convert a Decimal to Percent
To convert a decimal to a percent, multiply the decimal number by 100 and add the percent sign.
Example 1:
0.10 × 100 = 10%
Example 2:
0.675 × 100 = 67.5%
A quick mental trick: just move the decimal point two places to the right and write the percent sign.
Example:
0.45 → 45%
0.083 → 8.3%
You can also explore related conversions such as fractions and ratios using the Decimal to Fraction Calculator, which helps express decimals in fractional form.
How to Convert a Percent to a Decimal
To convert a percent back to a decimal, simply divide the number by 100 and remove the percent sign.
Formula:
Percent ÷ 100 = Decimal
Example 1:
15.6% ÷ 100 = 0.156
Example 2:
235% ÷ 100 = 2.35
Shortcut: Move the decimal point two places to the left and drop the % sign.
Example:
5% → 0.05
120% → 1.2
Worked Example: Express 0.5 as a Percent
Let’s go step by step to convert 0.5 into a percentage.
Step 1: Multiply by 100
0.5 × 100 = 50
Step 2: Add the percent sign
Result = 50%
Explanation:
“Percent” means “per 100,” so multiplying by 100 changes 0.5 into “50 per 100,” or 50%.
This process works the same way for any decimal number. For instance:
0.125 = 12.5%
0.9 = 90%
If you’re practicing problems involving number patterns or transformations, you can use tools like the Diamond Problem Solver to better understand relationships between values.
Quick Conversion Table
| Decimal | Percentage |
|---|---|
| 0.1 | 10% |
| 0.25 | 25% |
| 0.5 | 50% |
| 0.75 | 75% |
| 1.0 | 100% |
| 1.5 | 150% |
This table helps visualize how decimals increase proportionally when converted to percentages.
Why Decimal to Percent Conversion Matters
Converting between decimals and percentages is essential in everyday math—whether calculating discounts, interest rates, grades, or data proportions.
For example:
- A decimal of 0.2 means 20% off a product.
- An interest rate of 0.045 represents 4.5%.
Understanding this relationship strengthens skills in basic math, finance, and data analysis.
Summary
- To convert decimal → percent, multiply by 100 and add %.
- To convert percent → decimal, divide by 100 and remove %.
- Moving the decimal point two places (right or left) gives quick conversions.
This Decimal to Percent Calculator makes conversions effortless—just enter a decimal and get the percentage instantly.
For more number-related tools and converters, visit our Math Calculators page.