3\4:6\8

It looks like you're providing a ratio in the form of fractions. To simplify the ratio \( \frac{3}{4} : \frac{6}{8} \), let's first convert the second fraction to its simplest form.

The fraction \( \frac{6}{8} \) simplifies to \( \frac{3}{4} \) because both the numerator and the denominator can be divided by 2.

Now the ratio can be rewritten as:

\[ \frac{3}{4} : \frac{3}{4} \]

Since both parts of the ratio are equal, it simplifies to:

\[ 1 : 1 \]

Thus, the simplified form of the ratio \( \frac{3}{4} : \frac{6}{8} \) is \( 1 : 1 \).