Sometimes the numerator of a fraction will divide evenly into the denominator. The fraction can be reduced by replacing the numerator with a 1 and dividing the original denominator by the numerator to get a new denominator.
EXAMPLES:
 
because 4/2 = 2
 
because 6/2 = 3
Fractions in which the numerator and denominator contain the same factor can also be reduced by removing the common factor from both the numerator and the denominator.
EXAMPLES:
 
The 3s cancel because they are in both the numerator and the denominator, and you get     2/3
 
The 7s cancel and you get:     3/4
Reduce these fractions to their lowest terms:
(I will give you the common factors for the first 3 problems!)