The fraction 7 10 can be written as the Egyptian fraction 1 2 + 1 5 . Wiktionary

The calculation of M N where both M and N are real numbers can be done by expressing N as the sum of an integer h and an Egyptian fraction 1 / g 1 + 1 / g 2 + 1 / g 3 + . . . . Then M N = M h M g 1 M g 2 M g 3 . . . where each of the roots can be calculated by means of the Newton–Raphson method. Wiktionary