.391 as a Fraction
To convert .391 to a fraction you need to multiply 0.391/1 by 1000/1000 which equals 391/1000. This is the final result, since this fraction cannot be reduced.
 
What Is .391 as a Fraction?
.391 as a fraction in simplest form is 391/1000. You can verify this answer by using a calculator to divide 391 by 1000 and the result should be 0.391.
How to Convert .391 to a Fraction
Here are the steps to convert a decimal to a fraction, more specifically how to get .391 as a simplified fraction:
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    Rewrite 0.391 as a fraction dividing it by 1.
    0.391 1
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    Multiply the numerator and denominator by 1000. Because .391 has three digits after the decimal point, you need to multiply by 103=1000 to get rid of the decimal places.
    0.391 1×1000 1000=391 1000
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    Since the resulting fraction cannot be reduced any further, .391 as a fraction in simplest form is:
    391 1000