Why is the Nacl extracted with water 3 times?

Question: Why is the Nacl extracted  with water 3 times?

The purpase of the extraction of Nacl for 3times in water is the confirmation of the maximum amount of Nacl is extracted from the mixture such as  first time extraction  of Nacl from the water is approximately 50 percentage second time is approximately 25 percentage and third time almost 12.5 percentage and total is 87.5 percentage Nacl from the water.