4. describe the proportion method for solving a percentage problem:

Step-by-step explanation:

Consider the provided information.

For the proportion method first set up the equation like this:

Perform the cross multiplication and then solve for the missing part.

For example:

Find 80 percentage of 10.

Step 1: Set up the equation.

Step 2: Perform the cross multiplication

Step 3: Solve for the missing part.

There are different ways percent problems can be solved. One of the ways to solve a percent problem is by using proportion method.

By using proportion method, the set-up is the same, I.e.

=

In any given expression:

What number is 80% of 10?

It can be expressed as:

=

If we cross multiply, then we have:

10 x 80 = 100 x part

800 = 100 x part

= x part (800 cross out 100 to give 8 and 100 cross out 100)

8 = part

3 is what percentage of 6?

It can be expressed as:  

=

If we cross multiply, then we have:

3 x 100 = 6 x the percent

300 = 6 x the percent

= x the percent (300 cross out 6 to give 50 and 6 cross out 6)

50 = the percent

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