Here are the Rules to follow,
#1 Convert mixed fractions to Improper(top heavy) fractions.
#2 Bring to a common denominator(bottom number)
#3 Bring numerators(top numbers to equivalent values.
#4 Subtract the numertors
#5 Place numerators over denominators
#6 Convert back to a mixed fraction.
Here is an example.
2 1/5 - 1 3/4
#1 ; 11/5 - 7/4
#2 ; 5 x 4 = 20
#3 ; 11 x 4 = 44 & 7 x 5 = 35 (Note which numbers are multiplied together).
#4 ; 44 - 35 = 9
#5 ; 9/20
#6 ; This step can be ignored as numerator is smaller than the denominator.
NB For Addition of fractions use the same steps except '#4' ,where you ADD the numerators.
Hope that helps!!!!
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