> Pi, for example, cannot be written as a fraction.
Pi cannot be written as a decimal either.
Decimals _are_ a subset of the rationals. Any rational whose denominator has a prime factor other than 2 or 5 cannot be written using decimals.
Pi cannot be written as a decimal either.
Decimals _are_ a subset of the rationals. Any rational whose denominator has a prime factor other than 2 or 5 cannot be written using decimals.