2.7:2

The ratio 2.7:2 can be simplified. To do this, you can convert 2.7 to a fraction and simplify it:

1. Convert 2.7 into a fraction: \( 2.7 = \frac{27}{10} \).
2. Now, write the ratio as: \( \frac{27}{10} : 2 \).
3. To express 2 as a fraction, you can write it as \( \frac{20}{10} \).
4. Now, the ratio is \( \frac{27}{10} : \frac{20}{10} \).

Since both fractions have the same denominator, you can simplify the ratio to:

\[ 27 : 20 \].

So, the simplified form of the ratio 2.7:2 is 27:20.