hello supriya

this is really a bit shocking even for me because i have seen the last year cutoffs and that was not that much different . however this is all due to the process of normalization process which is a bit complicated to understand but jee mains use this method to predict the rank .it may happened that the number of candidates scoring above 147 was higher at that shift and the question paper relatively easier .

try percentile predictor to know more

https://engineering.careers360.com/articles/jee-main-percentile-predictor