### Home > CC4 > Chapter 5 > Lesson 5.2.1 > Problem 5-56

5-56.

On a recent bird-watching expedition, Eriq and Salle saw several different kinds of waterfowl. They saw grebes (), ducks (

*), cormorants (*

*), geese (*

*), and spoonbills (*

*). They saw some of the birds at the beach (*

*), some at the lake (*

*), and some in a field (*

*). Write an expression to represent each of the following pieces of information. Homework Help ✎*

The total number of birds that they saw.

The variables

represent the number of these types of birds.Total Number of Birds:

ORThe percentage of birds that they saw at the lake.

represents the number of Birds they saw at the Lake.

represents the total number of birds they saw.

To find a percentage, divide the target number by the total possible.The fraction of birds that were geese or ducks.