Answer:
32
Step-by-step explanation:
267+21=288
288/9=32
Tip is $8.64
Everyone pays $22.08
57.60×8%=$8.64
57.60+8.64=$66.24
$66.24÷3=$22.08
Is that the whole question or can you give me more information?
21 books; 5 weeks
4 1/2