Midoriya's power level against All Might How much percentage of Full Cowling Midoriya was using when he was fighting against All Might in the practical exam? At the last moment when he grabbed Bakugo and made his escape, I am pretty sure he was using more than 5%.
It should be 8%. Because, during the training with Gran Torino, Midoriya was able to improve his power up to 8%. Midoriyai has different percentage level moves, you can get more knowledge about them by referring the Wiki. He can increase the attack power percentage but it will affect his body and do a lot of damage to himself.