3/7,200

Step 1: Write down the fraction \frac{3}{7200} Step 2: Simplify the fraction by finding the greatest common divisor (GCD) of the numerator and the denominator. The GCD of 3 and 7200 is 3. Step 3: Divide both the numerator and the denominator by their GCD:
\frac{3 \div 3}{7200 \div 3} = \frac{1}{2400} Answer: \frac{1}{2400}