The Fibonacci Sequence and The Golden Ratio The Fibonacci sequence is a series of numbers where each number is the sum of the two preceding ones, typically starting with 0 and 1. It goes like this: 0, 1, 1, 2, 3, 5, 8, 13, and so on. The golden ratio, often denoted by the Greek letter φ (phi), is approximately 1.61803398875. It appears when a line is divided into two parts so that the whole length divided by the long part is also equal to the long part divided by the short part. The golden ratio