Question

At the Henry Doorly Zoo the giraffe grew from 24 inches to 60 inches long in five months. Find

the percent of change and show your work clearly. Is this a percent increase or percent
decrease?

Answer 1

The giraffe grew from 24 inches to 60 inches, resulting in a 150% increase in length. You calculate percent change by dividing the growth by the original length and multiplying by 100.

Step-by-step explanation:

To calculate the percent of change, you need to subtract the original length from the new length, divide the difference by the original length, and then multiply the result by 100. In the case of the giraffe that grew from 24 inches to 60 inches, the difference in length is 60 inches - 24 inches, which equals 36 inches. To find the percent increase, you divide 36 inches by the original length of 24 inches which equals 1.5 or 150%. Therefore, the giraffe's growth represents a 150% increase in length.

The formula for percent change is: Percent Change = ((New Length - Original Length) / Original Length) x 100

Step-by-Step Calculation:

1. Determine the original length (24 inches) and the new length (60 inches).
2. Calculate the difference in length: 60 inches - 24 inches = 36 inches.
3. Divide the difference by the original length: 36 inches / 24 inches = 1.5 or 150%.
4. Since the new length is greater than the original length, this is a percent increase.

This is a clear example of a percent increase as the final length is greater than the original length.

Answer 2

150%

It is a percentage increase

Step-by-step explanation:

We start by calculating the percentage increase

Mathematically, we have this as;

Percentage increase = (new value - old value)/old value * 100%

New value = new height = 60 inches

old value = old height = 24 inches

Substituting these values, we have ;

(60-24)/24 * 100%

= 36/24 * 100%

= 1.5 * 100% = 150%

It is a percentage increase as we can see growth