1. The problem is to find the formula for a ratio. 2. A ratio compares two quantities by division. 3. The general formula for the ratio of two quantities $a$ and $b$ is: $$\text{Ratio} = \frac{a}{b}$$ 4. This formula shows how many times $a$ contains $b$, or how $a$ relates to $b$. 5. You can express the ratio as $a:b$, but mathematically it is equivalent to $\frac{a}{b}$. 6. For example, if $a=6$ and $b=3$, then the ratio is $\frac{6}{3} = 2$ or $6:3$.