One of the five core numbers in numerology is derived from the date of birth and is called the Life Path Number. It reveals the path an individual is destined to walk in life, including inherent traits, challenges, and opportunities. The Life Path Number provides insights into the purpose and direction of one's life. Calculating your Life Path number involves summing up the digits of your birthdate until you get a single-digit or one of the master numbers (11, 22, 33). Here's a step-by-step guide:

1. Write down your full birthdate: Include the day, month, and year. For example, let’s say you were born on 25 November 1990. November is the eleventh month of the year. It would be written as 25/11/1990.

2. Break down each component: Turn the day, month, and year into single digits (except for the master numbers 11, 22, 33). Using the example date, you would have 2+5=7 (day), 11 (month), and 1+9+9+0=19; 1+9=1 (year).

3. Add the digits: Sum up the individual digits for the day, month, and year. In the example, it would be = day + month + year = 7 + 11 + 1 = 19

4. Reduce to a single digit: If the sum results in a two-digit number, add the digits together to reduce it to a single digit (except for the master numbers 11, 22, 33). In the example, you would add 1+9, resulting in 10, and then 1+0 to get 1.

In this example, the Life Path Number would be 1. If at any step, you get one of the master numbers (11, 22, 33), you don't reduce it further as they are considered master numbers with special significance.

Let’s do another example with date of birth of 13 July 1948:

Day = 13 = 1 + 3 = 4

Month = July = 7

Year = 1948 = 1 + 9 + 4 + 8 = 22 (This is master number and thus not reduced)

Total = day + month + year = 4 + 7 + 22 = 33 (This is master number and thus not reduced)

In this example, the life path number would be master number 33.

The Life Path Number has approximately 50% influence in human life, providing insights into life purpose and direction, with the remaining influence coming from the name. While the date of birth outlines the life path and direction, the name reflects how a person expresses themselves and the impact they can have in fulfilling their life path. The combination of these elements provides a comprehensive understanding of a person within the world of numerology.