(1) To convert a fraction to a percentage, divide the numerator by the denominator.

(2) In other words, a number is rational if we can write it as a fraction where the numerator and denominator are both integers.

(3) We stop when the fraction has a numerator or a denominator of 1.

(4) If you calculate the divergence for different species of plants, you find that both the numerator and the denominator are usually Fibonacci numbers.

(5) From this we observe that the rows of numerators and denominators of the terms in the Stern-Brocot tree are computed independently of each other.