Answer:
22/7
Explanation:
You want to know a ratio commonly used as an alternative to 3.14 for an approximation to pi.
Approximations
The value 3.14 as an approximation of pi is obtained by simply truncating the value to 2 decimal places. That makes the approximation lower than the actual value by about 0.0507%.
Rational approximations can be found from the expression of pi as a continued fraction. Truncating that fraction at various points gives the approximations ...
22/7 . . . . high by about 0.0402%
333/106 . . . . low by about 0.0026%
355/113 . . . . . high by about 0.0000085%
22/7 is the most commonly used rational approximation of pi instead of 3.14.
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Additional comment
The continued fraction is non-repeating. It starts ...
