Convert both to grams: 2 kg = 2000 g.<br><br>
&bull; Percentage = \(\frac{1500 \text{ g}}{2000 \text{ g}} \times 100\%\) = \(\frac{1500}{2000} \times 100\%\) = \(\frac{3}{4} \times 100\%\) = 75%<br><br>
Final Answer: 75%