Salad dressing P is made up of 30% vinegar and 70% oil, and salad dressing Q contains 10% vinegar and 90% oil. If the two dressings are combined to produce a salad dressing that is 22% vinegar, dressing P comprises what percentage of the new dressing? Choose the correct option.
A) 35%
B) 40%
C) 50%
D) 60%
E) 75%
Let x be the percentage of dressing P in the new dressing.   0.3x + 0.1(1-x) = 0.22   0.2x = 0.12   x = 0.6 = 60%   The answer is 60%.
<result>D</result>
Salad dressing P is made up of 30% vinegar and 70% oil, and salad dressing Q contains 10% vinegar and 90% oil. If the two dressings are combined to produce a salad dressing that is 22% vinegar, dressing P comprises what percentage of the new dressing?