Answer:
There is 7.5% increase in the number of songs on his mp3 player.
Explanation:
Original Songs in mp3= 440 songs
Final Songs in mp3= 473 songs
We need to find percent of increase in the number of songs on his mp3 player.
The formula used is:
![Percent \ of \ increase = (Final \ Value \ -\ Original \ Value)/(Original \ Value) * 100](https://img.qammunity.org/2021/formulas/mathematics/high-school/s93chn9r5uad7lq92jexjue9zis3jb8oe7.png)
Now putting values and finding percent of increase
![Percent \ of \ increase = (Final \ Value \ -\ Original \ Value)/(Original \ Value) * 100\\Percent \ of \ increase = (473-440)/(440) * 100\\Percent \ of \ increase = 7.5\%](https://img.qammunity.org/2021/formulas/mathematics/high-school/159h9pwhnezpvt30b6wku40j7lsa3cw4rv.png)
So, there is 7.5% increase in the number of songs on his mp3 player.