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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