Count the numbers in the spiral rotating one way, and then the other way. Read about the golden rectangle. Try to construct one. Find a picture of the Great Temple in Greece. A ratio is a fraction.
Some numbers make special ratios.
They are special for many reasons. They are unusually pleasing to the eye. And they occur very frequently in the natural world, for example, many things that spiral, such as seeds in a sunflower seedhead, or cone divisions on a pine cone, or pineapple plant, or a nautilus shell. Look at them for a while. Complete the process for the others.