Let $A$ be a particular item and $B$ another such that there is a constant ratio of $A$ to $B$.

• $\text{ratio of}B\text{'s to}A\text{'s}=\frac{1}{\text{ratio of}A\text{'s to}B\text{'s}}$ and $\text{ratio of}A\text{'s to}B\text{'s}=\frac{1}{\text{ratio of}B\text{'s to}A\text{'s}}$
• $\text{units of}A=\left(\text{units of}B\right)\times \left(\text{ratio of}A\text{'s to}B\text{'s}\right)=\frac{\text{units of}B}{\text{ratio of}B\text{'s to}A\text{'s}}$
• $\text{units of}B=\left(\text{units of}A\right)\times \left(\text{ratio of}B\text{'s to}A\text{'s}\right)=\frac{\text{units of}A}{\text{ratio of}A\text{'s to}B\text{'s}}$

$\text{Standard Divisor}=\frac{\text{Total Population}}{\text{House Size}}$

$\text{State's Standard Quota}=\frac{\text{State Population}}{\text{Standard Divisor}}\text{seats}$

$\text{population growth rate}=\frac{\text{current population size}-\text{previous population size}}{\text{previous population size}}$

$\text{New House Size}=\frac{\text{New Population}}{\text{Original Standard Divisor}}\text{rounded to the nearest whole number.}$