Mini Math Lesson
For use with the April 2011 issue, pages 4–5.
The World’s Different Types
of Endangered Species
Reading a Circle Graph
Insects, Snails,
Reptiles
and Arachnids
A circle graph shows data
and
as portions of a whole. Here,
Amphibians
the graph shows what portion
of the world’s endangered
6%
species are different types
8%
of living things.
Plants
The different portions are
Fish, Clams, and
13%
40%
Crustaceans
shown as percents (%).
A percent is a number out
of every 100. For example,
Birds
look at the light-blue section
15%
of the graph. It shows that
Mammals
15%, or 15 out of every 100,
18%
endangered species are birds.
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