0.21 as a Fraction
0.21 = 21/100
0.21 as a fraction in simplest form is 21/100.
Step by step
- 0.21 has 2 decimal places, so write it over 100: 21/100.
- Find the greatest common divisor of 21 and 100: 1.
- Divide the top and bottom by 1: 21 ÷ 1 = 21, 100 ÷ 1 = 100.
- So 0.21 = 21/100.
Details
- Fraction
- 21/100
- Percent
- 21%
- Nearest 1/16 (tape measure)
- 3/16
- Reciprocal
- 100/21 ≈ 4.7619
How it works
To turn a decimal into a fraction, count the digits after the decimal point, write the digits over 10, 100, 1,000 and so on, then simplify by dividing the numerator and denominator by their greatest common divisor. A decimal that ends (terminates) always converts to an exact fraction; a decimal that repeats forever, such as 0.333…, equals a fraction like 1/3.
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Frequently asked questions
What is 0.21 as a fraction?
0.21 is 21/100 in simplest form.
How do you convert 0.21 to a fraction?
Write 0.21 as 21/100, then divide the top and bottom by 1 to get 21/100.
What is 0.21 as a percentage?
0.21 × 100 = 21%.
Is 21/100 in simplest form?
Yes — 21 and 100 have no common factor other than 1.