Hayato-tachi, pls come in

Just curious that what's your actual Katana mastery?
After I calculated, my Katana mastery is like 53% (min divides max).
Then I go other classes and calculate, their mastery is 90% with 20% as base since expert gives 70%.

Does that mean Hayato is actually getting 33% only?

It means theres a calculation error somewhere. I think people have speculated that it's because of the beginner hyper not correctly adding to your minimum range.

Correct, shimada heart only adds to max range

Can you give me the range calculation for Hayato? My maths is no good.