Question

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%

Answer 1

STEP - BY - STEP EXPLANATION

What to find?

Percentage change.

Given:

original quantity = $30

New quantity = $39

Step 1

Recall the formula for percentage change.

`\text{ \% change=}\frac{new\text{ quantity-original quantity}}{original\text{ quantity}}*100\text{ \%}`

Step 2

Substitute the values.

`\text{ \% change=}(39-30)/(30)*100\text{ \%}`
`=(9)/(30)*100^\text{ \%}`
`=30\text{ \%}`

Hence, we have a 30% percentage increase.

ANSWER

C. 30%