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(DS Question 1)A clinical trial, conducted at hospital Z in Virginia, aimed to test the efficacy of drug X in the treatment of arthritis patients who had not seen any improvement using existing drugs. The hospital reported that, of the participants with arthritis, 60 percent showed improvement, while 55 percent experienced the side-effect of an increased heart rate. What percent of participants in this clinical trial experienced neither any side effects nor any improvement?
(PS Question 1)x is m percent of y, and z is k percent of y. If mk≠0, what percent is x of z in terms of m and k?