If a serum-lutein value >5.0 g/dL indicates that a participant is taking lutein capsules, then what percentage

If a serum-lutein value >5.0 μg/dL indicates that a participant is taking lutein capsules, then what percentage of the active group is complying? (Assume the old assay is correct and that the serum values can be measured exactly; that is, no continuity correction is needed.) 

In 1999, 100 participants were randomized to lutein and 100 participants were randomized to placebo. Each participant had his or her blood analyzed using the old assay method in 2000 after taking the study capsules for 1 year.

The mean serum-lutein level in the active group was 7.0 ± 4.0 (mean ± sd) based on the old assay and is assumed to be normally distributed. The mean serum-lutein level in the placebo group was 2.0 ± 1.5 (mean ± sd) based on the old assay and is assumed to be normally distributed.