I need help with Order of Operation question please help?

Question

I just have his one problem I cannot figure out. Please help me an explain how you gt the answer. Thanks so much!! 

simplify 

11 1/18 - 2 1/6 + 1 1/3=

Answer 1

Given mixed fraction =11 1/18 - 2 1/6 +1 1/3

Change the mixed fraction in to improper fraction

= 199/18 - 13/6 + 4/3

LCM of three fractions is = 18

=199 - 3(13) + 6(4)/18       simplification

=199 - 39 + 24/18

=160+24/18

=184/18

=10 4/18

=5 2/9