Answer:
1 4/7 bags of chocolate
Step-by-step explanation:
To see how many bags of chocolate she had before she shared some with the other teachers, we add 2 1/7 and 5/7, which is 2 6/7. When she shared some with the other teachers, it took away from her bags of chocolate. 2 6/7 subtracted by 1 2/7 is 1 4/7.
2 1/7 + 5/7 = 2 6/7
2 6/7 - 1 2/7 = 1 4/7
1 4/7 bags of chocolate (You can also say 1 bag of chocolate, cause technically, you can't cut a bag in half)