In mathematics, the Fibonacci sequence, that starts with 0 and 1, is a numerical series where each number is the sum of the two numbers that preced it (0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, etc).

When you divide a Fibonacci number by another Fibonacci number that is three places higher in the chain, you get 0.236 (23.6%).

When you divide a Fibonacci number by another Fibonacci number that is two places higher in the chain, you get 0.382 (38.2%).

When you divide a Fibonacci number by a succeeding Fibonacci number, you get 0.618 (61.8%).

The 0.786 (78.6%) Fibonacci number is the square root of 0.618 (61.8%).