0.021 as a Fraction
Writing 0.021 as a fraction requires us to multiply 0.021/1 by 1000/1000 which will result in 21/1000 - the final answer, since this fraction cannot be reduced.

What Is 0.021 as a Fraction?
0.021 as a fraction in lowest terms is 21/1000. Quick tip: to verify the answer is correct, use a calculator to divide 21 by 1000 and you should get 0.021.
How to Work Out 0.021 as a Fraction
The simple steps below will help you convert a decimal into a fraction. In this example we’ll demonstrate how to write .021 as a simplified fraction:
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Turn 0.021 into a fraction dividing it by 1.
0.021 1
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To get rid of the decimal point, multiply the numerator and denominator by 1000. Why 1000? 0.021 has three digits after the decimal point, so you need to multiply by 1 followed by 3 zeros (1000).
0.021 1×1000 1000=21 1000
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Because this fraction cannot be reduced any further, 0.021 as a fraction in simplest form is:
21 1000