Question

Cost of 27 books in rupee 3420 So what number of books
we can buy in 1920 rupee​

Answer 1

With ₹3420 we can buy 27 books

So with ₹1920,

$\frac{27}{3420} \times 1920$

= 15 books

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Answer 2

3420 divided by 1920 equals 1.78125. If 27 divided by 1.78125 equals 15.1578947368, then that means that you can buy 15 books for 1920 rupee.