First you have to know that dividing by 9/18 is the same as multiplying by 18/9.
So you have (1/3)/(9/18) = (1/3)*(18/9) = 18/(3*9)
you can simplify by 9
= (2*9)/(3*9)
=2/3
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five eighteenths
6/18 = 1/3 (one third)
nine eighteenths is one half. Half of 6/7 must be 3/7
One third divided by two and one third = 1/7
45 multiplied by one-third = 15; 45 divided by one-third = 135.