Suppose you were born on 25 August 1997.
Complete birth date is to be written in numbers as 25 08 1997
Now make singular numbers of all i.e. date, month & year
Date - 25 = 2 + 5 = 7
Month - 08 = 0 + 8 = 8
Year - 1997 = 1 + 9 + 9 + 7 = 26 = 2 + 6 = 8
Now Calculate Life number from above = 23 = 5 = { 5 } (Five)
Thus in the above case the Life number comes to 5 (Five).. you can check from the singular number section under the head Numerology, what is the signification of Number 5. Or the number you have derived for your birth date.
One can observe keenly that major events in life would move around this life Number or the multiples of this number.