## Birds

## Work Time

# Birds

Karen read that the population of birds on an island increases by 20% each year. She figured out that the population would therefore double after five years.

- What mistake in reasoning about percents did Karen make?
- Using examples, explain why Karen’s reasoning is incorrect.

## Hint:

What does it mean for a population to “double” in terms of percent? How do you think Karen came up with this percent based on what she read?