The **Fibonacci Sequence** is a famous number sequence in which

the next number is found by adding up the two numbers before it.

0+1=1

1+1 =2

2+1=3

2+3=5

5+3=8

This famous number sequence was introduced to Europe by Leonardo Pisano Bigollo,who later became known by his nickname Fibonacci, in his book titled *Liber Abaci* in 1202.

The **Fibonacci sequence** can be expressed with the formula

•fn = fn-1 + fn-2

If you divide a number in the sequence by the one before it you get the same number 1.618

144/89 = 1.618

377/233=1.618

This has been called the **Golden Ratio.**

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