Question

Стоимость некоторого товара 140 руб. сначала его стоимость повысили на 20%, а потом снизили на 25%. Какой стала Цена товара после этих изменений? На сколько процентов изменилась начальная цена?

Answer 1

20 % от 140 = 28
140+28=168
25% от 168=42
168-42=126

по пропорции считаете
140-100%
126-х%

Answer 2

1) 140*0,2=28
2) 140+28=168
3) 168*0,25=42
4) 168-42 =126

Answer 3

Calculation of the Final Price

To calculate the final price of the product after the given changes, we can follow these steps:

1. Increase the initial price by 20%. 2. Decrease the increased price by 25%.

Let's calculate the final price step by step:

1. Increase the initial price of 140 rubles by 20%: - 140 rubles + (20% of 140 rubles) = 140 rubles + 28 rubles = 168 rubles.

2. Decrease the increased price of 168 rubles by 25%: - 168 rubles - (25% of 168 rubles) = 168 rubles - 42 rubles = 126 rubles.

Therefore, the final price of the product after these changes is 126 rubles.

Percentage Change in the Initial Price

To calculate the percentage change in the initial price, we can compare the difference between the initial price and the final price with the initial price. Here's how we can calculate it:

1. Calculate the difference between the initial price of 140 rubles and the final price of 126 rubles: - 140 rubles - 126 rubles = 14 rubles.

2. Calculate the percentage change by dividing the difference by the initial price and multiplying by 100: - (14 rubles / 140 rubles) * 100 = 10%.

Therefore, the initial price of the product has decreased by 10%.

Please note that the information provided above is based on calculations and does not cite specific sources.