Final answer:
The percentage increase from the least expensive to the most expensive policy cannot be determined without specific figures for the policies. However, a related example shows a 5.85% increase, which may suggest looking for a similar percentage among provided policy numbers if available.
Step-by-step explanation:
The question requires calculating the percentage of increase from the least expensive policy to the most expensive policy. To find the percentage increase, you would subtract the smaller number from the larger one, divide the difference by the original (smaller) number, and then multiply the result by 100 to get the percentage. However, without the exact figures for the least and most expensive policies given, it's not possible to calculate the precise increase. Since we have a related example calculation of a cost of living increase—where the rise in cost is (22442120) / 2120, resulting in 0.0585 or 5.85%—we should look for a similar increase in the provided numbers for the insurance policies to determine the closest match.