Mathematics for IGCSE & O level - The Four Operations (Section 9 - No. 14)
When simplifying fractions, you should:
Add the numerator and denominator.
Multiply the numerator and denominator by the same number.
Divide both the numerator and the denominator by their greatest common factor.
Change the fraction to a mixed number.
Explication
Divide the numerator and denominator by the greatest common factor.