The Egyptians had an interesting way to represent fractions 3000 BC
Their notation did not allow to write 3/5 or 3/7 or 2/7, but write like 1/2 and 1/3 and 1/4 and so on.
Any ordinary Fraction could be converted to egyptian fraction, For example, 3/4 = 1/2 + 1/4, 6/7 = 1/2 + 1/3 + 1/42.
The calculator to find all the Egyptian fractions of shortest length for an ordinary fraction.