Question

Вартість товару 90 грн початку її зменшили 20% ,а потім збільшили на 10% .Якою стало ватість товару ?На скільки відцотків змінилася початкова ціна?

Answer 1

1)90:100*20=18(грн)-зменшили ціну..
2)90-18=72(грн) -стала ціна після зменшення на 20%.
3)72:100*10=7,20(грн)-збільшили ціну..
4)72+7,2=79,2(грн)-стала ціна товару.
5)79,2*100:90=88(%)-стала ціна товару.
6)100-88=12(%)-змінилася початкова ціна.

Answer 2

Calculation of the Final Price

To calculate the final price of the product after a 20% decrease followed by a 10% increase, we can follow these steps:

1. Start with the initial price of the product, which is 90 грн. 2. Apply a 20% decrease to the initial price: - 20% of 90 грн is (20/100) * 90 = 18 грн. - Subtracting 18 грн from 90 грн gives us 72 грн. 3. Apply a 10% increase to the price after the decrease: - 10% of 72 грн is (10/100) * 72 = 7.2 грн. - Adding 7.2 грн to 72 грн gives us 79.2 грн.

Therefore, the final price of the product is 79.2 грн.

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 to the initial price itself.

1. Calculate the difference between the initial price (90 грн) and the final price (79.2 грн): - 90 грн - 79.2 грн = 10.8 грн. 2. Calculate the percentage change by dividing the difference by the initial price and multiplying by 100: - (10.8 грн / 90 грн) * 100 ≈ 12%.

Therefore, the initial price has decreased by approximately 12%.

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