What is 3.99999..... converted into a fraction?

Question

babyslapmafro · Answer

4

anonymous · Answer

? @Babyslapmafro

babyslapmafro · Answer

4/1

anonymous · Answer

That doesn't make sense...

babyslapmafro · Answer

3.99999999... is an irrational number, it can not be expressed as a ratio of two numbers (a fraction)

babyslapmafro · Answer

We got a man on the moon computing to the thousandth decimal-place, unless you're working at the Jet Propulsion Lab right now you'll be ok with the number 4.

anonymous · Answer

you're all wrong, actually ^^

anonymous · Answer

take 3.99... and find the last place. For this equation, the 9 would be in the hundredths place. Now, make x = 3.99...

anonymous · Answer

3 99999/100000, google serch it :)

babyslapmafro · Answer

if the 9 is repeating infinitely: 3.99999... is irrational

1.33333... where the 3's are repeating infinitely is rational, it can be expressed as 4/3

anonymous · Answer

scratch that last sentence. Move the decimal two places so your number is now 399. take 100 and multiply it by x. you will then have 100x.

babyslapmafro · Answer

I understand, but how do you write 3.9999.... as a fraction if the 9's repeat infinitely?

you can't

anonymous · Answer

1000x =399.99... now, 
1000x-1=999x
399.99-.99...=399

babyslapmafro · Answer

There is no debate here

anonymous · Answer

399
----
999

anonymous · Answer

haha my math teacher taught me this ^^

anonymous · Answer

I'm confused..

anonymous · Answer

/:

jigglypuff314 · Answer

http://en.wikipedia.org/wiki/0.999... so the first person who commented was correct :)