Question

I know it's very trifling of me to ask this but, I do not understand. If can so much as help me with just a few that would save me a lot.

Answer 1

Percent increase

1.
`60` %

2.
`50` %

3.
`74.42` %

4.
`11.46` %

5.
`220` %

Explanation:

1. $5 to $8

`(8-5)/(5) * 100 = 60` %

2. From 20 students to 30 students

`(30-20)/(20) * 100 = 50` %

3. From 86 books to 150 books

`(150-86)/(86) * 100 = 74.42` %

4. From $3.49 to $ 3.89

`(3.89-3.49)/(3.49) * 100 = 11.46` %

5. From 5 mile to 16 mile

`(16-5)/(5) * 100 = 220` %