attention rectangle The definition will make more sense when you've seen an example. What is the common factor? 5 What is the prime factorization of 32? 2 × 2 × 2 × 2 2 × 2 × 2 × 4 2 × 2 × 2 × 2 × 2 2 × 2 × 2 × 2 × 2 Reduce FRAC18/42 to lowest terms. FRAC9/21 FRAC6/14 FRAC3/7 FRAC3/7