### Section 1: **Introduction and Converting from Fraction to Percent Form**

### It Is Important That You Watch This Video First

A percent is a ratio (fraction) whose denominator is 100.

To convert a fraction to percent form, form a proportion by setting the fraction equal to and solve for P.

* Example*:

Write 5/8 in percent form.

* Solution*: Set the fraction equal to P/100 and solve for P:

Solve by setting cross products equal to each other.

500 = 8P

Divide by 8:

P = = 67.5

5/8 = 67.5%

** To convert from percent form to fraction form: **

Drop the percent sign and place the value over 100. Then simplify the fraction.

* Example*:

Write 55% in fraction form.

* Solution*:

55% =

Reduce the fraction:

=

*Test Your Knowledge by opening up the Test Yourself Activity.*

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