12:4

Possible interpretations of 12:4:

• As a ratio: simplifies to 3:1 (divide both terms by gcd(12,4)=4).
• As a division: 12 ÷ 4 = 3.
• As a time: 12:04 (12:04 PM).

If you meant the ratio, the answer is 3:1. Which interpretation did you need?