Answer: There about 453 students in 6th grade.
Step-by-step explanation:
68/0.15 453.3333...
453.333.. is a repeating decimal and we can't have that as a students so if has to be a whole number which is 453.
check: 453 * 0.15 = 67.95 which rounds up to 68.
So about 385 of the students chose Star Wars.