Question

7. A bookshop had 12000 books. In the first week of April, it sold 15% of the books; and in the second week, it cold 15% less. show many books did it sell in the second week? Also find the number if books sold in the bookshop after the second week? ​

Answer 1

Answer:

Total books in bookshop = 12000 books

Books sold in first week

= (15/100)*12000

= 1800

Books sold in second week

= 1800(1 - 15/100)

= 1800(17/20)

= 90*17

= 1530

Number of books left after second week  

= 12000 - 1800 - 1530  

= 12000 - 3330

= 8670

Answer 2

In the first week it sell

15% of total book of 12000

$\mapsto{12000\:×\:\frac{15}{100}}$

$\mapsto{120\:×\:15}$

$\mapsto{1800}$

⠀

in second week it sold 15% less books of first week.

$\mapsto{1800\:×\:\frac{15}{100}}$

$\mapsto{18\:×\:15}$

$\mapsto{270}$

⠀

in the second week it sold

→ 1800 - 270

→ 1530

in two weeks they sold total of 3330 books .