2/3 of a pizza are left over. a group of friends divided the leftover pizza into pieces each equal to 1/18 of the original pizza. After each friend took one piece 1/6 of the leftover pizza remained. How many friends were in the group?

1 Answer
Jun 30, 2018

I got 9 but check my reasoning anyway:

Explanation:

Let us say that tere are x friends.
Each one gets 1/18 of the original pizza: but this in turn leaves 1/6 of the 2/3 leftover.
I write it as:

1/18x=2/3-1/6

rearranging:

x=12-3=9