In some countries, the teaspoon is used as a unit of volume, especially in cooking recipes and pharmaceutic prescriptions. It is abbreviated in English as t. or tsp., German and Dutch: TL, from Teelöffel or Theelepel. A teaspoon is often taken to mean 5 millilitres. Two thirds of a teaspoon is 3.33 millilitres of volume. Two halves of 3.33 millilitres is 1.67 millilitres each. Don't use it for weight measuring. Are you asking "How many half-teaspoons are in 2/3 teaspoon?" If so, 2/3 divided by 1/2 = 4/3. There are 1.33333... halves in 2/3 of anything, not just teaspoons.
66.666%.
8.
one third
Are you serious? Seven. There are seven halves in seven halves.
3
81 halves
17 halves
3 halves
3 halves
5.5 is 11 halves.
12 halves.
There are 184 halves in 92.