It takes 6 hours to clean a garden. In 2 hours 30 minutes, how much part of the garden can be cleaned?

$\frac{5}{2}$ $\frac{5}{12}$ $\frac{5}{8}$ $\frac{5}{6}$

$\frac{5}{12}$

If it takes 6 hours to complete the work, Using unitary method, Amount of work completed in 1 hour = $\frac{1}{6}$ Thus, amount of work completed in 2.5 hours = $\frac{1}{6}$ x 2.5 = $\frac{5}{12}$