Post on 22-Dec-2015
Equation n = 0.32 • 40
Use an equation to solve: 32% of 40 is what number?
COURSE 2 LESSON 6-6COURSE 2 LESSON 6-6
n = 0.32 • 40 = 12.8 Simplify.
6-6
Solving Percent Problems Using Equations
Words A number is 32% of 40.
Let n = the number.
Use an equation to solve: 18% of what number is 81?
COURSE 2 LESSON 6-6COURSE 2 LESSON 6-6
0.18n 81 0.18 0.18= Divide each side by 0.18.
n = 450 Simplify.
6-6
Solving Percent Problems Using Equations
Equation 0.18 • n = 81
Words 18% of a number is 81.
Let n = the number.
Let p = the percent.
Words A percent of 200 is 45.
Use an equation to solve: What percent of 200 is 45?
COURSE 2 LESSON 6-6COURSE 2 LESSON 6-6
200p 45 200 200= Divide each side by 200.
p • 200 = 45Equation
p • 200 = 45
Simplify. 200p = 45
p = 0.225 Use a calculator.
p = 22.5% Write the decimal as a percent.
6-6
Solving Percent Problems Using Equations
Write and solve an equation.
1. 6% of 38 is what number?
2. 40% of what number is 24?
3. What percent of 52 is 13?
4. 96% of what number is 240?
COURSE 2 LESSON 6-6COURSE 2 LESSON 6-6
n = 6% • 38; 2.28
24 = 40% • n; 60
13 = n% • 52; 25%
240 = 96% • n; 250
6-6
Solving Percent Problems Using Equations