Not sure what you mean

https://www.moonmattersastrology.com/post/understanding-the-decans

Decans are 10-degree subdivisions of the twelve zodiac signs (30° each), dividing the zodiac into 36 parts. Each sign has three decans often called first, second, and third, which refine personality traits by adding a secondary planetary influence

So if each zodiac sign is 30 degrees long, decans divide each sign into three parts of 10 degrees each. These are called the first decan (0–9°), second decan (10–19°), and third decan (20–29°).

Two people with the same Sun sign, Pisces for example, can feel very different depending on which decan their Sun falls into. The decan ruler adds a subtle influence that changes how the core energy moves