To determine which class has a greater ratio of students who wear glasses to the total number of students, we can calculate the ratio for each class.
Janet's Class:
- Number of students who wear glasses: 15
- Total number of students: 25
Ratio for Janet's class: \[ \frac{15}{25} = \frac{3}{5} = 0.6 \]
Kate's Class:
- Number of students who wear glasses: 12
- Total number of students: 20
Ratio for Kate's class: \[ \frac{12}{20} = \frac{3}{5} = 0.6 \]
Both classes have the same ratio of 0.6.
Therefore, the answer is (c) neither. The classes have the same ratio.