899 1312/1327 hope this helps
Adding, subtracting, and multiplying fractions are pretty easy depending on the level of knowledge. Other easy equations could be inverse operations.
By definition and according to Google:
"Irrational numbers<span> cannot be represented as terminating or repeating decimals."
So the answer to your question would have to be 'no' as calculators were designed to give us approximate answers when dealing with irrational numbers.
It would be hard to guess whether a large number produced by a calculator is irrational or not given that fact that many rational numbers can be incredibly long.
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Lets set up a ratio!
17.00USD per 51 pounds and 1 pound per x dollars.

next step. cross multiply for the answer :)