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

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

*G*), ducks (*D*), cormorants (*C*), geese (*E*), and spoonbills (*S*). They saw some of the birds at the beach (*B*), some at the lake (*L*), and some in a field (*F*). Write an expression to represent each of the following pieces of information. Homework Help ✎The total number of birds that they saw.

The percentage of birds that they saw at the lake.

The fraction of birds that were geese or ducks.

The variables *G, D, C, E,* and *S* represent the number of these types of birds.

Total Number of Birds: *G + D + C + E + S *

OR *B + L + F*

*L* represents the number of Birds they saw at the Lake.

*B + L + F* represents the total number of birds they saw.

To find a percentage, divide the target number by the total possible.