Question 855662
If he completes {{{2/9}}} in 3 days, then he completes {{{2/27}}} per day.
He has already completed {{{6/27}}}(or{{{2/9}}}).  
{{{27/27}}}(the complete job) - {{{6/27}}}(what he's done so far) leaves {{{21/27}}} or {{{7/9}}}.  3 days per {{{2/9}}} means that it will take him 3.5 times that to finish.
3.5 * 3 = 10.5 more days