April 19, 2011
Lesson 11.2
Percents
Percent means out of 100.
We translate sentences to algebraic equations and then
solve them using the appropriate properties of equality.
1. 25% of 432 is what number?
2. What percent of 68 is 72?
3. 92% of what number is 23?
1
April 19, 2011
What percent of the figure is colored orange?
21 ft.
16 ft.
16 ft.
35 ft.
1) Find the ratio of the area colored orange to the
area of the entire rectangle.
Ratio of orange area
Ratio of entire rectangle
=
=
n
2) Write a proportion setting this ratio equal to
.
100
Solve for n.
2