Percent Problems

1
Percent Problems

• Solving Simple Percent Problems

2
Using the Percent Proportion

• Simple percent problems have three parts.
• The percentage easy to spot has
• The base always follows the word of
• The amount the third number

3
Find 5 of 20

• Identify the three parts.
• The percentage 5
• The base of 20
• The amount what we are trying to find x

4
The Percent Proportion

• This proportion always works with simple percent
  problems.

5
Find 5 of 20

1. The percentage 5
2. The base of 20
3. The amount what we are trying to find x

6
Find 5 of 20

• Cross-multiply 100 x 100
• Divide x 1
• 5 of 20 is 1

7
What percent of 40 is 15?

1. The percentage what we are trying to find x
2. The base of 40
3. The amount 15

8
What percent of 40 is 15?

• Cross-multiply 40 x 1500
• Divide x 37.5
• 15 is 37.5 of 40

9
20 is 40 of what number?

1. The percentage 40
2. The base what we are trying to find - of what -
   x
3. The amount 20

10
20 is 40 of what number?

• Cross-multiply 40 x 2000
• Divide x 50
• 20 is 40 of 50

11
Using the Percent Proportion
The percentage easy to spot has The base
always follows the word of The amount the
third number To solve Cross-multiply and
divide