Nearly 30%. According to official website of Sichuan University, in 2022, the failure rate of calculus in Sichuan University was nearly 30%, and it was not very difficult to learn calculus in Sichuan University. Many formulas were enough, and the failure rate was not particularly high, but some people found it difficult if they didn't understand it. Sichuan University, referred to as "Sichuan University", is located in Chengdu, Sichuan Province. It is a national key university directly under the Ministry of Education, a high-level research-oriented comprehensive university located in the west of China, and a national "double-class" construction university (Class A).