Question

The price of a notebook was $3.20 yesterday. Today, the price rose to $3.70. Find the percentage Increase. Round your answer to the nearest tenth of a
percent.

Answer 1

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➷  We need to use this formula:

percentage change = (difference/original) x 100

Substitute the values in:

percentage change = (0.5/3.2) x 100

Solve:

percentage change = 15.625

To the nearest tenth, it would round to 15.6%

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Answer 2

Given the value of the original price of notebook and the value of the new price, the percent​age increase is 15.6%.

What is percent​ increase?

Percent​ increase is simply the amount of increase from the initial value to the new value in terms of 100 parts of the initial value.

It is expressed as;

C = ((x₂ - x₁) / x₁)100%

Where x₁ is initial value and x₂ is new value

Given the data in the question;

• Initial value x₁ = $3.20

• New value x₂ = $3.70

• Percentage increase C = ?

We substitute the given values into the expression above.

C = (($3.70 - $3.20) / $3.20)100%

C = ( $0.5 / $3.20 )100%

C = ( 0.15625 )100%

C = 15.6%

Therefore, given the value of the original price of notebook and the value of the new price, the percent​age increase is 15.6%.

Learn more about Percentages here: brainly.com/question/24159063

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