smc

Let the cost of the product be C, and the selling price be S. Since Adams wants a 10% profit on the sale, and his expenses are 15% of the sale, we add $0.10S$ and $0.15S$ to the cost to get the selling price. Then, $S=C+0.15S+0.10S\Rightarrow 0.75S=C\Rightarrow S=\frac{4}{3}C\Rightarrow \boxed{33\frac{1}{3}\%}$.