Question

antonio read 15 books over the summer at the end of july he had read 4/5 of the books how many books has he read

Answer 1

12 books by the end of July.

Answer 2

15/5 = 3.
So 4 x 3 = 12. so 4/5 of 15 is 12. So Antonio read 12 books at the end of July.