39:18

The ratio 39:18 can be simplified by finding the greatest common divisor (GCD) of the two numbers.

1. The GCD of 39 and 18 is 3.

2. Now, divide both numbers by their GCD:

   • \( 39 ÷ 3 = 13 \)
   • \( 18 ÷ 3 = 6 \)

So, the simplified form of the ratio 39:18 is 13:6.