Question

За январь цена картофеля повысилась на 30%, феврале снизилась на 12%. На сколько % повысилась цена на картофель за 2 месяца.

Answer 1

Пусть первоначальная цена равна х, тогда за январь месяц цена стала (1+30:100)х=1.3х., после февраля 1.3x*(1-12/100)=1.144 x

Значит за два месяца цена увеличилась на 1.144х-х=0.144х, т.е. на

0.144х:х*100%=14.4 %

 

Answer 2

Calculation of the Percentage Increase in Potato Prices

To calculate the percentage increase in potato prices over two months, we need to consider the price change in January and February.

According to the available search results, the price of potatoes increased by 30% in January and then decreased by 12% in February.

To calculate the overall percentage increase, we can use the following formula:

Overall Percentage Increase = (1 + Percentage Increase in January) × (1 + Percentage Increase in February) - 1

Let's calculate the overall percentage increase:

1. Percentage Increase in January: 30% = 0.3 2. Percentage Decrease in February: -12% = -0.12

Using the formula mentioned above, we can calculate the overall percentage increase:

Overall Percentage Increase = (1 + 0.3) × (1 - 0.12) - 1

Calculating the expression:

(1 + 0.3) × (1 - 0.12) - 1 = 1.3 × 0.88 - 1 = 1.144 - 1 = 0.144

Therefore, the overall percentage increase in potato prices over the two months is approximately 14.4%.

Please note that the provided calculation assumes that the percentage changes in January and February are independent of each other and that the price changes are applied sequentially.