Question

express 2. 327 as rational number
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Answer 1

LETS ASSUME 2.327 IS AN IRRATIONAL NO.

∴ 2.327 ≠ $\frac{p}{q}$

BUT HERE THE RHS IS A RATIONAL NO. (THAT'S ITS THE SYMBOL DENOTING RATIONAL NO.)

AND LHS IS ALSO A RATIONAL NO.

HENCE OUR ASSUMPTION THAT 2.327 IS AN IRRATIONAL NO. IS CONTRADICTORY.

∴ HENCE PROVED 2.327 IS AN RATIONAL NUMBER.