Answer:
The answer is: \(\frac{1}{3}\) bag.
Step-by-step explanation:
A new baby elephant ate \(\frac{2}{3}\) bag of feed for breakfast.
For lunch, the elephant ate \(\frac{1}{2}\) as much as he did for breakfast.
Means he ate \(\frac{1}{2} \times\frac{2}{3}\) bag of feed for lunch.
It becomes \(\frac{1}{3}\) bag.