Question

В августе цена книги подорожала на 20%, а в сентябре еше на 10%. На сколько процентов подорожала данная книга за эти два месяца?​

Answer 1

Ответ:

на 32%

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Answer 2

Calculating the Percentage Increase in Book Price

To calculate the percentage increase in the price of the book over the two months, we can use the formula for successive percentage changes.

The formula for successive percentage changes is: \[ \text{Total Percentage Change} = \frac{A + B + (A \times B)}{100} \] Where A and B are the individual percentage changes.

In this case, the book price increased by 20% in August and then by 10% in September.

Using the formula: \[ \text{Total Percentage Change} = \frac{20 + 10 + (20 \times 10)}{100} \]

Calculating: \[ \text{Total Percentage Change} = \frac{20 + 10 + 200}{100} = \frac{230}{100} = 2.3 \]

The book price increased by 23% over the two months.