A survey of 300 people on music listening preferences in 2000 and 2010 is represented by two pie charts. In 2000, 90 degrees of the pie chart represented internet listening. In 2010, 120 degrees repre

In 2000, the angle for internet preference (purple/dotted section) is $90^\circ$. There were 300 people surveyed.

$$\text{People in 2000} = \frac{90^\circ}{360^\circ} \times 300 = \frac{1}{4} \times 300 = 75$$

In 2010, the angle for internet preference (purple/dotted section) is $120^\circ$. There were 300 people surveyed.

$$\text{People in 2010} = \frac{120^\circ}{360^\circ} \times 300 = \frac{1}{3} \times 300 = 100$$

$$\text{Difference} = \text{People in 2010} - \text{People in 2000} = 100 - 75 = 25$$

There were 25 more people who preferred to listen on the internet in 2010 than in 2000.

The final answer is $\text{25}$.