Question

Sebastian carried 1/2 liter or water on a hike. He drank 2/3 of the water. How much water did he drink?

Answer 1

1/2 litre is 500ml
and 2/3 if 500 is (2/3)*500=333.3 ml
amount of water he drink is 333.3 ml or 1/3 litre

Answer 2

he drank (2/3) of (1/2) liter=(2/3)(1/2) liter=1/3 liter.

Answer: he drank 1/3 liter of water.