One can define an infinite number of fractions to successively approximate pi, and get closer and closer to pi's value. There is no closest fraction to pi. No matter how close the fraction is to pi you can always find one that is closer.
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If you're looking at a list under this question in the book, I'm sorry you're not letting me see it, and there's no way I can give you the best answer from that list. My choice for the fraction closest to the actual value of (pi) is 22/7 . It's only about 0.04% wrong.
22 over 7
22/7 No! It's a joke. There is no fraction value for pi. Pi is an irrational number, meaning that it cannot be represented in fractional form.
It is: 22/7
The fraction 22/7 is close to PI for four significant digits.