Answer:
<em>hope</em><em> </em><em>you</em><em> </em><em>like</em><em> </em><em>my</em><em> </em><em>answer</em><em> </em><em>its</em><em> </em><em>2</em><em>/</em><em>7</em>
If mark and 8 of his friends went out the total of people is 9, so if you think about it 9x9=81 so the total cost of the bill was $81
