What is a fractional approximation of pi?

Answer 1

22/7 is the most commonly used (non-decimal) fractional approximation of pi

Here is are some more precise approximations listed in order of precision

1. ) 3123/994 , accurate to 3 decimal places
2. ) 2199/700 , accurate to 3 decimal places
3. ) 311/99 , accurate to 3 decimal places
4. ) 355/113, accurate to 6 decimal places
5. ) 180 / (57.295777777777777...) , accurate to 7 decimal places
6. ) (9.42477777777...) / 3 , accurate to 7 decimal places.

here is the 32 digit decimal approximation

3.1415926535897932384626433832795"