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