# .3999999999999999999 as a fraction

## .3999999999999999999 as a fraction - solution and the full explanation with calculations.

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## What is .3999999999999999999 as a fraction?

To write .3999999999999999999 as a fraction you have to write .3999999999999999999 as numerator and put 1 as the denominator. Now you multiply numerator and denominator by 10 as long as you get in numerator the whole number.
.3999999999999999999 = .3999999999999999999/1 = 4/10

And finally we have:
.3999999999999999999 as a fraction equals 4/10