The class which has a greater percent of students who ride the bus is Walter's class
Walter's class:
Percentage of students who ride bus = 14 / 15 × 100
= 0.933 × 100
= 93.3%
Sasha's class:
Percentage of students who ride bus = 11 / 20 × 100
= 0.55 × 20
= 55%
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