Question

Solve question number 4

Answer 1

Ah, to be seeing this for the first time.

We have

`x = 0.999999999...`

So

`10x = 9.99999999...`

Subtracting,

`9x = 9`

`x = 1`

Answer (as a fraction): 1/1

That's not an approximation; 0.9999... is exactly equal to 1.