Hi, after running through this problem a handful of times and reviewing the manual, I think it must be miskeyed.
Here’s a screenshot of the explanation from the question with the issues highlighted.

In a nutshell, I think the formula is reversed (percent increase should be 40%(MeTV) and 37.5%(On-demand)) and then the smaller value (MeTV) is indicated as the larger value.
The answer should be 250/400 for 62.5%.