What mistake did Margie make

Question

Margie writes a word problem for the expression 1/3 divided by 6. A bottle of mouthwash is 1/3 empty. If the remaining amount is divided equally over 6 weeks, what fraction of the bottle is used each week? What mistake did Margie make?

Answer 1

The question states that the bottle is 1/3 empty.

If the bottle is 1/3 empty, how much mouthwash is left in the bottle?

If the bottle is 1/3 empty, there is 2/3 of the bottle left.

Therefore, the word problem is written for the expression 2/3 divided by 6 rather than 1/3 divided by 6.