In 6th grade Lilly read 15 books. This year in 7th grade she rad 18 books. What is the percent of increase in the number books that Lilly read this year?

Question

asked Dec 16, 2019 58.3k views

1 Answer

Ftynse · Answer 1 · 2019-12-21T14:17:33+0000

Answer: 20%

Explanation:

To solve this problem you must apply the proccedure shown below:

1. You must apply the following formula (Let's call the percent of increase:
):

x=((increase)/(original))(100)

$increase=18-15\\original=15$

2. Substitute values and solve:

$x=((18-15)/(15))(100)\\$

x=20 %