Find the LCD (least common denominator) of the fractions by determining the least common multiple (LCM) of all denominators
Factor each denominator into primes
Take the highest power of each prime that appears in any denominator
Multiply the selected prime powers to form the LCD
If any factorization is difficult, use LCM by listing multiples of the denominators until a common multiple is found
Use the LCD as the common denominator for rewriting each fraction so their numerators match the needed equivalent fractions