Answer:
7. B) 26–35
8. C) 31/77
Explanation:
7. It's a matter of writing the fractions in a way that lets you compare their values. It is usually convenient to convert them to decimal:
(age group, healthy fraction)
(18–25, 9/48 = 0.1875)
(26–35, 16/98 ≈ 0.1633)
(36–45, 19/94 ≈ 0.2021)
(> 45, 12/60 = 0.2000)
The group with the smallest percentage of healthy blood sugar is 26–35.
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8. There are 94+60 = 154 study participants who are at least 36. Of those, 35+27 = 62 are at risk for diabetes. That ratio is ...
62/154 = 31/77