The feed to a distillation column contains $38\%$ benzene, the remainder toluene. The overhead $($product$)$ contains $61\%$ benzene and the bottoms $($waste$)$ contains $4\%$ benzene. Calculate the percentage of the total feed that leaves as product. $($Round the final answer to three decimal places.$)$

The percentage of total feed that leaves as product is: $\%.$