Question

Товар коштував 400 грн. Спочатку його ціну підвищили на 20%, а потім нову ціну знизили на 20%.Якою стала ціна товару після цих змін? На скільки відсотків змінилася початкова ціна? Помогите пожалуйста

Answer 1

1) 400+20%= 480грн

2)480-20%=384грн

Answer 2

Calculation of the New Price

To calculate the new price of the item after the changes, we can follow these steps:

1. Start with the initial price of the item, which is 400 грн. 2. Increase the price by 20%. 3. Decrease the new price by 20%.

Let's calculate the new price step by step:

1. Increase the initial price by 20%: - 400 грн + (20% of 400 грн) = 400 грн + (0.2 * 400 грн) = 400 грн + 80 грн = 480 грн.

2. Decrease the new price by 20%: - 480 грн - (20% of 480 грн) = 480 грн - (0.2 * 480 грн) = 480 грн - 96 грн = 384 грн.

Therefore, the new price of the item after the changes is 384 грн.

Percentage Change in the Initial Price

To calculate the percentage change in the initial price, we can use the following formula:

Percentage Change = ((New Value - Old Value) / Old Value) * 100

Let's calculate the percentage change in the initial price:

Percentage Change = ((384 грн - 400 грн) / 400 грн) * 100 = (-16 грн / 400 грн) * 100 = -4%

Therefore, the initial price decreased by 4%.

I hope this helps! Let me know if you have any further questions.