DOES THE GAME NOT KNOW BASIC MATH?!

SO, IN THE DOMINANCE ENDING OF THE IBERIAN STRUGGLE, 75% OF YOUR CAPITAL KINGDOM NEEDS TO BE YOUR CULTURE AND FAITH. I (PLAYING AS CASTILLE) HAVE 23 OUT OF THIRTY COUNTIES AS CATHOLIC AND CASTILLIAN. YET IT ISN'T ENABLING THE DECISION! I HAVE EVERYTHING ELSE! 22.5 IS 75% OF 30. THE. GAME. DOESN'T. KNOW. BASIC. MATH!!!!