Answer:
2:3
Step-by-step explanation:
12:18 (divide by small number:1)
6:9(divide by: 3)
2:3(look at both the side and simplify)
12 = 2 * 2 * 3
18 = 2 * 3 * 3
GCF = 2 *3 = 6
12 : 18 = 12÷ 6 : 18÷6
= 2 : 3
