What ratio, expressed as a percentage, is between 80 and 85?

To determine the appropriate ratio expressed as a percentage between 80 and 85, we need to consider the concept of improvement involving values that can represent a percentage change or growth. In this context, improvement generally signifies the growth or increase from one value to another, which can be quantified when looking at two specific figures, as you would with 80 and 85.

In the provided example, the calculation to find the percentage increase from 80 to 85 is crucial. The formula for finding the percentage increase is:

[

\text{Percentage Increase} = \left( \frac{\text{New Value} - \text{Old Value}}{\text{Old Value}} \right) \times 100

]

Substituting the values:

[

\text{Percentage Increase} = \left( \frac{85 - 80}{80} \right) \times 100 = \left( \frac{5}{80} \right) \times 100 = 6.25%

]

Thus, this percentage indicates the rate of improvement from 80 to 85.

Other options like overall rate, mortgage constant, and vacancy do not apply as directly to the concept of measuring improvement between two figures.