Question

Pilar has 40 shells in her collection. She goes to the beach. Shecollects 6 more shells in the morning and 3 more shells in theafternoon. What is the percent change in Pilar's shell collectionfrom the beginning of the day to the end?

Answer 1

Pilar's shell collection increased by 22.5% after collecting 9 additional shells, raising her collection from 40 to 49 by the end of the day.

Step-by-step explanation:

Percent Change in Pilar's Shell Collection

Pilar started with 40 shells in her collection. After collecting 6 more shells in the morning and 3 more shells in the afternoon, she has a total of 49 shells by the end of the day. To find the percent change, we use the formula:

Percent Change = ((new amount - original amount) / original amount) * 100%

In this case, it will be:

Percent Change = ((49 - 40) / 40) * 100% = (9 / 40) * 100%

Calculating this, we get:

Percent Change = 0.225 * 100% = 22.5%

Therefore, the percent change in Pilar's shell collection from the beginning of the day to the end is 22.5%.

Answer 2

the increment in the number of shells is 9

the original number of shells is 40

the percent change is computed as follows:

`\frac{\text{ increment}}{\text{ original}}\cdot100`

Substituting:

`\begin{gathered} \text{ percent change=}(9)/(40)\cdot100 \\ \text{ percent change=}22.5\text{ \%} \end{gathered}`