Question

Шариковая ручка стоит 10 рублей. какое наибольшее число таких ручек можно будет купить на 800 рублей после повышения цены на 25%?

Answer 1

1) Узнаем, сколько будет стоить ручка после подорожания
10 руб. - 100%
  х руб. - 125%
х=10*125/100=12,5 руб
2) 800/12,5 = 64 ручки можно будет купить

Ответ: 64 ручки

Answer 2

Calculation of the Maximum Number of Pens

To calculate the maximum number of pens that can be purchased for 800 rubles after a 25% price increase, we need to follow these steps:

1. Determine the original price of the pen: The original price of the pen is 10 rubles. 2. Calculate the new price after a 25% increase: To calculate the new price, we need to add 25% of the original price to the original price.

- 25% of 10 rubles = 2.5 rubles - New price = 10 rubles + 2.5 rubles = 12.5 rubles

3. Calculate the maximum number of pens that can be purchased with 800 rubles: To calculate this, we need to divide the total amount of money (800 rubles) by the new price of the pen (12.5 rubles).

- Maximum number of pens = 800 rubles / 12.5 rubles = 64 pens

Therefore, the maximum number of pens that can be purchased for 800 rubles after a 25% price increase is 64 pens.

Conclusion

After a 25% price increase, you will be able to buy a maximum of 64 pens for 800 rubles.