Question

A company starts to track the number of phone calls received each month. Information about the number of phone calls the company received the first three months of tracking is listed below.

- During the first month, the company received 4,264 phone calls. - During the second month, the company received 25% more phone calls than in the first month. - During the third month, the company received 6,396 phone calls.


What was the percent increase in the number of phone calls from the second month to the third month? Remember to show your thinking! Use proportions when you can.

Answer 1

20%

Explanation:

First month = 4264 phone calls

Second month = 25% more phone calls than the first month

⇒ second month = 4264 × 1.25 = 5330

Third month = 6396 phone calls

`\mathsffinal \ value - initial \ value`

`\implies \mathsf{percentage \ change=(6396 - 5330)/(5330)* 100\%}`

`\implies \mathsf{percentage \ change=(1)/(5)* 100\%}`

`\implies \mathsf{percentage \ change=20\%}`