Question

Библиотечный фонд школы за год увеличелся на 125%.Сколько кгниг стало в школьной библиотеке , если первоночально в ней было а)400 книг б) 640 книг.

Answer 1

а) 400---100%

    х---125%

400*125/100=500 книг пришло за год

400+500=900 книг всего к концу года стало

б) 640----100%

    х-----125%

640*125/100=800 книг пришло за год

640+800=1440 книг всего стало к концу года

Answer 2

Calculating the Increase in the School Library's Book Collection

To calculate the increase in the school library's book collection, we can use the following formula:

New Total = Original Total + (Original Total * Increase Percentage)

Let's calculate the new total for both scenarios.

a) If the original number of books in the library was 400: - Increase Percentage: 125% - New Total = 400 + (400 * 1.25) = 400 + 500 = 900 books

b) If the original number of books in the library was 640: - Increase Percentage: 125% - New Total = 640 + (640 * 1.25) = 640 + 800 = 1440 books

So, if the initial number of books in the school library was 400, the new total would be 900 books, and if the initial number of books was 640, the new total would be 1440 books.