Answer:

Sum of 2/3 and 5/18

:- (12+3)/18

= 15/18 = 5/6

Difference of 1/6 and 7/6

=> (7-1)/6

= 5/6

so, Divide 5/6 by 5/6

= 5/6×6/5

= 1

[tex]hence \: \\ 1 \: is \: the \: correct \: answer \: [/tex]