bookseller has 1200 books. 25% of them are on mathematics, 35% of them are on science
and the rest are on other subjects. Fin

1 thought on “bookseller has 1200 books. 25% of them are on mathematics, 35% of them are on science<br />and the rest are on other subjects. Fin”

1. Answer:

   I’ll explain only maths book.

   Suppose there are 100 books.

   So, out of 100%, there are 25% maths books.

   Out of 100, there will be 25.

   100 → 25 maths books (given)

   1 → 25/100 = ¼ maths books

   1200 → 1200 × ¼ = 300 maths books.

   Same as, for science,

   100 → 35

   1 → 35/100

   1200 → 1200 × 35/100 = 420

   For others, using %es,

   100 → 40

   1 → 4/10

   1200 → 1200 × 4/10 = 480.

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