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The eye of Horus

 In Ancient Egyptian most fractions were written as the sum of two or more unit fractions (a fraction with 1 as the numerator), with scribes possessing tables of answers (see Rhind Mathematical Papyrus 2/n table).Thus instead of 3⁄4, one would write 1⁄2 + 1⁄4.

Different parts of the Eye of Horus were thought to be used by the ancient Egyptians to represent one divided by the first six powers of two:

The right side of the eye = 1⁄2
The pupil = 1⁄4
The eyebrow = 1⁄8
The left side of the eye = 1⁄16
The curved tail = 1⁄32
The teardrop = 1⁄64