• Add up all numbers involved.
→ If the answer is more than two digits, add all of the digits to one another
(in the event of a two digit number, add the [tens digit] and the [ones digit].)
→ Keep adding digits until you are left with a single-digit number.
→ That number is the [digital root].
(e.g) 6 + 7 + 8 = 21 → 2 + 1 = [3]
(e.g) 1 + 2 + 3 + 4 = 10 → 1 + 0 = [1]