The brain has 75% of water

Hi,
What do you think of this sentence structure using "has 75$ of sth" as in this sentence:
The brain has 75% of water.
Apples have 70 percent of water.
Strawberries have 90% of water.
etc.
If not right, would you fix it like this:1.
1.. The brain is 75% water.
2. The brain has 75% water.
3. The brain is made of 75% water.
4. The brain is made of 75% of water.
5. Water makes 75% of the brain.
6 Water is 75% of the brain.

Thanks.