Call your number "x", and calculate 10 times that number.10x = 7.777...
x = 0.777...
Subtract the second equation from the first, and you get:
9x = 7
If you solve this for "x", you get the number as a fraction. In this case, it is 7/9.
7/9
7/11
It is: 7/9
If that is .636363... recurring 63 then as a fraction it is 7/11
If you mean: .63 recurring then as a fraction in its lowest terms it is 7/11
If you mean: 0.7777....recurring 7 then as a fraction it is 7/9
7/30
7/9
7/11
If you mean: 0.7777....recurring 7 then as a fraction it is 7/9
16
It is: 7/9
If that is .636363... recurring 63 then as a fraction it is 7/11
If it is recurring 3 then as a fraction it is 7/3 and it is already expressed as a decimal
If you mean: .63 recurring then as a fraction in its lowest terms it is 7/11
21/99
If that is 3 recurring then as a fraction it is 7/3