Decimal to Percent

Turn decimals into percentages by multiplying by 100. Works with whole numbers and decimal portions.

Convert any decimal to a percentage instantly. Multiply by 100 to transform decimals like 0.25 into 25%.

Decimal (max 15 chars)
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100
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Percent
Try:
help_outlineHow to Useexpand_more

This tool changes any decimal into its percentage equivalent. Just enter your decimal and watch it transform instantly—works with whole numbers, small decimals, and values greater than 1.

The Simple Method:

Take your decimal and multiply it by 100, then add the % symbol.

Example: 0.10 → 0.10 × 100 = 10%

Example: 0.675 → 0.675 × 100 = 67.5%

Quick Shortcut:

Simply shift the decimal point two places to the right. That's it!

0.25 → 25% (decimal moves from before 2 to after 5)

infoWhat is Decimal to Percent?expand_more

Turning a decimal into a percent means rewriting it as a number "per hundred." The word percent comes from the Latin "per centum"—literally "by the hundred." So when you multiply by 100, you're finding how many hundredths your decimal represents.

Understanding the Math:

Take 0.5 as an example:

We want to express 0.5 as "something per 100"

Multiply by 100/100 (which equals 1, so we don't change the value):

0.5 × (100/100) = 50/100

50/100 means "50 per hundred" = 50%

Decimals Under 1

Give percentages under 100%

0.75 → 75%

Decimals Over 1

Give percentages over 100%

2.35 → 235%

functionsFormulaexpand_more

Decimal to Percent Formula:

Percent = Decimal × 100

Reverse: Percent to Decimal:

Decimal = Percent ÷ 100

Move the decimal point two places left and remove the % sign.

Example: 15.6% → 15.6 ÷ 100 = 0.156

The Shortcut Method:

Decimal → Percent: Move decimal 2 places RIGHT

0.675 → 67.5%

Percent → Decimal: Move decimal 2 places LEFT

235% → 2.35

lightbulbExamplesexpand_more

Common Decimal

0.5 = 50%

0.5 × 100 = 50

Small Decimal

0.10 = 10%

0.10 × 100 = 10

Three Decimal Places

0.675 = 67.5%

0.675 × 100 = 67.5

Greater Than 1

2.35 = 235%

2.35 × 100 = 235

Very Small

0.005 = 0.5%

0.005 × 100 = 0.5

Quarter

0.25 = 25%

0.25 × 100 = 25

quizFAQexpand_more
What if my decimal is larger than 1?expand_more
The conversion works identically—just multiply by 100. Decimals above 1 become percentages above 100%. For instance, 2.35 becomes 235%, meaning 2.35 times or 235% of the original amount.
How do tiny decimals like 0.005 convert?expand_more
Same formula applies. Multiply 0.005 by 100 to get 0.5%. Very small decimals produce percentages less than 1%, which are perfectly valid values.
Why does multiplying by 100 work?expand_more
The word 'percent' means 'per hundred.' When you multiply by 100, you're calculating how many parts per 100 your decimal represents. Since 0.5 equals 50 out of 100, we write it as 50%.
How do I go backwards from percent to decimal?expand_more
Divide by 100 and drop the % symbol. For 75%, calculate 75 ÷ 100 = 0.75. The shortcut: move the decimal two places to the left.
What about negative decimals?expand_more
Negative decimals convert to negative percentages. Just apply the same multiplication: -0.25 × 100 = -25%. The negative sign stays with your answer.
Is there a mental math trick for this?expand_more
Yes! Simply move the decimal point two positions to the right. For 0.675, shift the decimal past 6 and 7 to get 67.5%. No multiplication needed in your head.