Step by step for GCF= The prime factorization of 20 is 2,5 The prime factorization of 18 is 2,3 The common multiple they share is 2
Step by step for LCM=
the prime factorization of 18 18 = 2 × 3 × 3 the prime factorization of 20 20 = 2 × 2 × 5 Multiply each factor the greater number of times it occurs to find lcm
