Light and sound waves are generally fast but light waves is the fastest known thing ever existed. Speed of sound waves is dependent on the media where the waves will pass through. It is fastest in metal at a speed of 5960 m/s. I can also travel in air and water at 343 and 1482 m/s respectively (20 degrees Celsius at atmospheric pressure). Light waves are extremely fast! It has an average speed of 300,000,000 m/s (values also varies depending on location).
The most typical example that shows the comparison of the speed of sound and light waves is the thunder and lightning. Both happens at the same time but we always see the lightning before we hear the thunder. This is because light travels faster than sound.