To reduce the fraction \(\frac{60}{100}\), we can divide both the numerator and the denominator by their greatest common divisor (GCD).
The GCD of 60 and 100 is 20.
Now, dividing both the numerator and the denominator by 20:
\[ \frac{60 \div 20}{100 \div 20} = \frac{3}{5} \]
Thus, the reduced form of \(\frac{60}{100}\) is \(\frac{3}{5}\).
Among the given options, the answer is:
Three-fifths.