Well your percentile seems quite low and I don't think that you might have been alloted a seat in the first round of JOSAA in NIT Patna. Don't know if you are from home state quota or not but still that might not be of much help. The cut-off for NIT Patna is only going to go up because of it's recent developments in infrastructure and curriculum so if I were you, I wouldn't be sure about getting a seat.