



 
Hi Chris, To arrive at 35.1% as the percentage of unit X sold you performed the calculation The question you ask is an ideal place to use a little algebra. Suppose that you sell z additional units of unit X and this results in 46.3% of the total units sold being unit X. The total sold is then 43,241 + z and the number sold of unit X is 15,182 + z. Using the same calculation as above you would have Solve for z. If you need additional help write back,  


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