78:18

The ratio 78:18 can be simplified. To do this, you can divide both numbers by their greatest common divisor (GCD). First, find the GCD of 78 and 18. - The prime factorization of 78 is: \( 78 = 2 \times 3 \times 13 \) - The prime factorization of 18 is: \( 18 = 2 \times 3^2 \) The common factors are \( 2 \) and \( 3 \). Therefore, the GCD is \( 2 \times 3 = 6 \). Now, divide both numbers by their GCD: - \( 78 ÷ 6 = 13 \) - \( 18 ÷ 6 = 3 \) Thus, the simplified ratio is: **13:3**.