Acceptable Difference% Good value

https://learn.365datascience.com/courses/machine-learning-in-python/linear-regression-practical-example-part-5/
Around the 6th minute.

Hello,
I have seen the above video where it was said that the Difference % 512 was very high. And in the same vein anything above 200% was also marked as high. I was wondering what was a good acceptable difference %age?
There were a total of 774 rows. And even 60% and higher was just 89 rows.

(df_pf['Difference%'] > 60).sum()
#89
#total rows =774

Thank you
Regards.