There's no way to tell for certain. If Percy is a big fan of the original books, he might be more likely to read fanfiction. However, some people just prefer to stick with the canon material. So, it's really up in the air.
I'm not sure how often Percy reads fanfiction. It could depend on his personal interests and how much free time he has. Maybe he reads it whenever he discovers a really interesting piece.
Chapter 328, "Persuading the Old Master", is the clearest early answer because it turns Persuading's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Jiang Li's authoritative words stunned the old man.
Chapter 251, "It seems that going on a transformation show is really useful!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. Early on, If Du Qinglian was somewhat angry just a moment ago, now she was....
Chapter 869, "This Marriage Must Not Happen!", is the clearest early answer because a shaky connection becomes usable in the plot. A useful checkpoint is the way the scene starts with Xue Wandeng also liked this daughter-in-law very much and hurriedly...
Chapter 443, "Did Jiang Li Steal Team F's Home?", is the clearest early answer because it turns Wenwen's situation into a concrete plot event.
Chapter 538, "You Won't Get Angry No Matter What I Ask, Right?", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Su Yinwan couldn't ignore Jiang Cheng's unusual behavior any longer...
Chapter 383, "Doomsday Beehive", is the clearest early answer because it turns Wilderness Survival's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Jiang Li's pale fingertips rubbed against the handle of the coffee...
Chapter 532, "Little Lolita Beats Up Jungle Python?!", is the clearest early answer because it turns Pei Ye's situation into a concrete plot event. Early on, Outside the cave, the four people grasped their weapons tightly and....
Chapter 525, "Help It Transcend", is the clearest early answer because it turns Xiao Hei's situation into a concrete plot event.
Chapter 432, "Return to the Homeland!", is the clearest early answer because it pushes Zhou Xu into a new phase or setting. It opens with Jiang Li had also received the updated rankings. and closes on He looked at the owner with a hint of surprise..
Chapter 420, "Who Says the Attacker Can't Attack the Attacker?", is the clearest early answer because the buildup finally cashes out in a real clash. Early on, After choosing to defend, Guan Xiong quickly made a decision..