Dear Aspirant,
As per the 2019 official report present on the UP cutoff website the top 20 percentile criteria is as follows-
PASSED IN FULL EXAM IN Humanities(A)--->303 / 500
PASSED IN FULL EXAM IN Science(B)--->333 / 500
PASSED IN FULL EXAM IN Commerce(C)--->314 / 500
So I hope you have got a clear view about the marks you would need to score to acquire top 20 percentile in UP Board.Best of luck.
To choose from the best colleges you can also follow the below link-
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile