Original sentence: Although the number of speakers is growing, the percentage of Assam's population who have it as a mother tongue has fallen slightly
Edited sentence: Although the number of speakers is growing, the percentage of Assam's population who have it as a mother tongue has fallen sharply.However, If Bengali-majority Barak Valley region is excluded, then the percentage of native Assamese speakers in Assam alone will rise directly to 56% from 48% as per 2011 Census figures calculation