Xiao Li has 45 books, Xiao Fang's books are Xiao Ming's, five sixths of Xiao Ming's, and Xiao Li's books are three fourths of Xiao Fang's. how many books does Xiao Ming have

Xiao Li has 45 books, Xiao Fang's books are Xiao Ming's, five sixths of Xiao Ming's, and Xiao Li's books are three fourths of Xiao Fang's. how many books does Xiao Ming have

45÷3/4÷5/6
=60÷5/6
=72 copies