0.665 as a Fraction
To convert 0.665 to a fraction you need to multiply 0.665/1 by 1000/1000 and you’ll get 665/1000. This result can be further reduced to 133/200.

What Is 0.665 as a Fraction?
0.665 as a fraction in simplest form is 133/200. You can verify this answer by using a calculator to divide 133 by 200 and the result should be 0.665.
How to Convert 0.665 to a Fraction
Here are the steps to convert a decimal to a fraction, more specifically how to get .665 as a simplified fraction:
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Rewrite 0.665 as a fraction dividing it by 1.
0.665 1
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Multiply the numerator and denominator by 1000. Because 0.665 has three digits after the decimal point, you need to multiply by 103=1000 to get rid of the decimal places.
0.665 1×1000 1000=665 1000
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Divide 665 and 1000 by their Greatest Common Factor (GCF), which in this case is 5.
665 ÷ 5 1000 ÷ 5
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So 0.665 as a fraction in simplest form is:
133 200