2,7:0,3

It seems like you may be referring to a ratio or a division problem. To clarify, "2,7:0,3" can be understood in a few different ways depending on what you need:

1. Ratio: If you're looking at it as a ratio (2.7:0.3), you can simplify it by dividing both sides by 0.3: \[ \frac{2.7}{0.3} = 9 \] So the ratio simplifies to 9:1.

2. Division: If this is a division problem, you would calculate: \[ 2.7 \div 0.3 = 9 \]

Please specify what context you're referring to if you're looking for a different interpretation.