What is 7/9 written as a decimal please explain!!

7/9 as a decimal is 0.777.

7/9 is basically saying 7 divided by 9.
 Since 9 doesn't at all go into 7, we have to make a decimal using long division.
So because a decimal isn't a whole number, we put 0.(blank) at the top in place of the regular number.
After, you just continue with the regular long division, but every time the divisor doesn't go into the number from the subtraction, you bring down a zero.

Sorry if this was kind of confusing!
Just watch a video on it if this didn't help.

So first say the fraction to yourself and that's how it's written so it's 7/9 would be seven ninths then work it out