What does the depreciation formula express?

The depreciation formula expresses the relationship between effective age and the asset's replacement value, which allows for the calculation of depreciation associated with a property or an asset. By taking effective age and dividing it by the sum of effective age plus the replacement value, the formula provides a metric for understanding how much value has been lost due to aging and wear and tear over time. This is essential for appraisers and property managers, as it assists in determining the current value of a property relative to its original value and what it would cost to replace it. This formula helps in assessing an asset's overall condition and its remaining useful life.

The other options don't accurately describe the essence of the depreciation formula. Option A refers to total value without consideration of depreciation, which misses the formula's purpose. Option C discusses remaining value over time but lacks the necessary context of effective age and replacement value. Option D suggests a focus on percentage loss, but the formula is more precise in accounting for the relationship between effective age and replacement value rather than just a simple loss percentage.