Answer (all three are correct):
1.21216(7)
7273/6000

Step-by-step explanation:
We can split this number, 7.273, into 7.2 + 0.073
7.2/6 = 1.2 because the decimal in 7.2 is one place to the left. So if you did 72/6 = 12, you have to add the decimal point 1 place to the left.
0.073/6 This one is hard
The decimal in 0.073 is 3 places to the left. Now we need to do 73/6 then add the decimal point 3 places to the left of the quotient or divide the quotient by 1000. 73/6 = 
We can't add the decimal point to a fraction, so we can divide it by 2

The parenthesis around 7 means repeating
1.2 + 0.01216(7) = 1.21216(7)
In fraction form, 1.2 = 7200/6000

1.21216(7) is the same as 7273/6000 or 1 73/6000
Hope this helps :)
Have a great day!