Convert 6 m to cm: 6 m = 600 cm.<br><br>
&bull; Percentage = \(\frac{150 \text{ cm}}{600 \text{ cm}} \times 100\%\) = \(\frac{150}{600} \times 100\%\) = \(\frac{1}{4} \times 100\%\) = 25%<br>
&bull; This matches option C: 25%.<br><br>
Final Answer: C: 25%