If Henry still has 1/3 left that means that 234 was 2/3 of the book because 1/3 + 2/3 = 3/3 = The whole book.
To find out how many pages 1/3 is, we have to divide 234 by 2 because 234 is 2 thirds added together or 1 third multiplied by 2 and the inverse of that is divided by 2.
234 ÷ 2 = 117
So 1/3 is equal to 117 pages.
Like I said before 1/3 + 2/3 = 3/3 = The whole book.
117 is equal to 1/3 and 234 is equal to 2/3 so we add them together.
