Find the common difference of the sequence shown.
1/2,1/4 , 0,
a.-1/8
b.-1/4
c.-1/2

1/2 , 1/4, 0

Find the common difference:

Rules in subtracting fraction
1) make sure the each fraction has a common denominator
2) if they have different denominators, find each least common multiple.
3) multiply the  fraction by the lcm. apply the lcm to both numerator and denominator

1/4 - 1/2 
1/4 - (1/2 * 2/2)
1/4 - 2/4  = 1-2/4 = -1/4

0 - 1/4 = -1/4

The common difference is B. -1/4