Question

A teacher went to class with a number of exercise books. He gave 1/9 of the books to Kuwornu and 2/5 to Amina. Amina had 18 books. Find the number of books (I) Kuwornu had (ii) the teacher took to the class​

Answer 1

i) 5 books

ii) 45 books

Explanation:

Let x = the number of exercise books.

(2/5)x = 18. Solve for x.

x = 18/(2/5)

x = 45

So the teacher had a total of 45 books. That's part ii.

Kuwornu has 1/9th of the books. So multiply 1/9 times x to figure out how many books. We just figured out that x = 45.

So 1/9 * 45 = 5 books. Kuwornu had 5 books.