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11/9 = 1.222... recurring.
22/7 is the most commonly used (non-decimal) fractional approximation of piHere is are some more precise approximations listed in order of precision) 3123/994 , accurate to 3 decimal places) 2199/700 , accurate to 3 decimal places) 311/99 , accurate to 3 decimal places) 355/113, accurate to 6 decimal places) 180 / (57.295777777777777...) , accurate to 7 decimal places) (9.42477777777...) / 3 , accurate to 7 decimal places.here is the 32 digit decimal approximation3.1415926535897932384626433832795"
2/9 to two decimal places is 0.22 .
As a terminating decimal, 0.777777778 = 777777778/1000000000 = 388888889/500000000 As an approximation to (rounding to 9 decimal places of) the recurring decimal 0.777... (that is 7 repeating for ever), 0.777... = 7/9
Value of pi was first given by the semi god Krishna in Mahabharata to 32 accurate decimal places .In fact it can be extended more.Archimedes long later used an approximation method to calculate pi to 4 decimal places see the link below for how to calculate pi to 32 accurate decimal places http://archives.amritapuri.org/bharat/bharat.php