The Fibonacci sequence of numbers is a numerical series documented in Leonardo’s ‘Liber Abaci’. In the sequence, after 0 and 1, every number is the sum of the two numbers before it. Thus, the Fibonacci sequence looks something like this: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, and so on.

As you can see, the sequence can extend to infinity. Looking at the numbers, you will observe that every next number is approximately 1.618 times larger than the preceding number — or the other way round, each number is 0.618 of the number following it. For example, if you divide 55 by 34, you will get 1.618, and if you divide 34 by 55, you will get 0.618.