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The price of a cup coffee was 2.40 yesterday. Today, the price fell to 2.15 find the percentage decrease. Round the answer to the nearest tenth of percent. Please help

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ANSWER

The percentage decrease is 10.4%.

EXPLANATION

To calculate percentage decrease, use the formula,

Percentage decrease

[tex] = \frac{new \: price - old \: price}{old \: price} \times 100\%[/tex]

Yesterday the price of coffee was 2.40. This is the old price.

Today the price is 2.15. This is the new price.

[tex] = \frac{2.15 - 2.40}{2.40} \times 100\%[/tex]

[tex] = \frac{ - 0.25}{2.40} \times 100\%[/tex]

[tex]= - 0. 10416667 \times 100\%[/tex]

[tex] = - 10.416667\%[/tex]

To the nearest tenth, we have:

[tex] - 10.4\%[/tex]

Therefore the percentage decrease is 10.4%.

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