Answer:
The percent of change is 26%.
Explanation:
Given that:
Original cost of DVD = $26.99 
Current price of DVD = $19.99 
Difference = 26.99 - 19.99 = $7.00
As the cost is reduced, the percent of change is decreased. 
Percent of change = 

Percent of change = 

Percent of change = 0.259 * 100 
Percent of change = 25.9% 
Rounding off to nearest whole percent 
Percent of change = 26% 
Hence, 
The percent of change is 26%.