To find the common ratio in a geometric sequence, just follow these easy steps:

1. Pick Two Neighboring Terms: Choose any two terms that come one after the other in the sequence. For example, let’s pick $a_1$ and $a_2$.

2. Divide the Terms: Use this formula: $r = \frac{a_2}{a_1}$ Here, $r$ is the common ratio.

3. Make Sure It's the Same: Check that the ratio you found is the same for other pairs of terms in the sequence.

And that’s all there is to it! It’s really that simple!