At Kira's school, 5/9 of the 360 students bring their lunch. The other students buy lunch in the cafeteria. How many more students bring lunch from home than buy lunch?

(5/9) of 360 would be 5(40), or 200.

200 students bring their lunches; (360-200), or 160, eat in the cafeteria.

What's the difference?  200-160 = 40

40 more students bring their lunches than do eat in the cafeteria.