Brianna has 6 bags of soil. Filling one flowerpot requires
1
3
1
3
of a bag of soil. How many flowerpots can be filled with these 6 bags
To fill one flowerpot requires 1/3 and 1/3 of a bag of soil. Together they make 2/3 of a bag of soil.
So, 6 bags of soil can fill (6 x 3/2) flowerpots.
Simplifying, 6 x 3/2 = 9 flowerpots can be filled with these 6 bags of soil.