Final answer:
The discount percentage on music in the iTunes sale is 20%, which corresponds to option c.
Step-by-step explanation:
The discount percentage on music in the iTunes sale can be determined by comparing the original price of the music to the sale price and calculating the difference. Let's say the original price of a music album is $10 and the sale price is $8. To find the discount percentage, we need to calculate the difference between the original price and the sale price, which is $10 - $8 = $2. Then, we divide this difference by the original price and multiply by 100 to get the discount percentage:
- Discount = ($10 - $8) = $2
- Percentage discount = ($2 / $10) x 100 = 20%
Therefore, the discount percentage on music in the iTunes sale is 20%, which corresponds to option c.