A certain brand of soup contains 10 percent tomato paste by volume. Which of the following expressions represents the percent of tomato paste by volume in a mixture of s cups of soup and w cups of water?
(A)\(\frac{10s}{w}\)\% (B)\(\frac{10}{s + w}\)\% (C)\(\frac{s + w}{10}\)\% (D)\(\frac{10s}{s + w}\)\% (E)\(\frac{s}{10(s + w)}\)\%
D