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Estimation Suppose the original quantity is $30 and the new quantity is $39. Estimate the percentchange. Is this an example of a percent increase or a percent decrease?Which of these is the best estimate for the percent change?OA. 100%OB. 90%OC. 30%OD. 60%

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STEP - BY - STEP EXPLANATION

What to find?

Percentage change.

Given:

original quantity = $30

New quantity = $39

Step 1

Recall the formula for percentage change.

[tex]\text{ \% change=}\frac{new\text{ quantity-original quantity}}{original\text{ quantity}}\times100\text{ \%}[/tex]

Step 2

Substitute the values.

[tex]\text{ \% change=}\frac{39-30}{30}\times100\text{ \%}[/tex][tex]=\frac{9}{30}\times100^\text{ \%}[/tex][tex]=30\text{ \%}[/tex]

Hence, we have a 30% percentage increase.

ANSWER

C. 30%

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