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Sales ComparisonMEDIUM16.4% of exam

Why are lump-sum dollar adjustments generally preferred to percentage adjustments in the sales grid?

Correct Answer

D) Because most are derived in dollars, and order then does not matter

Adjustments should be applied the way they were derived, and most are derived as dollar amounts (market conditions and perhaps location are exceptions). The sequence also does not matter for dollar adjustments, which is not always true for percentages.

Answer Options
A
Because percentages are prohibited in residential appraisals
B
Because dollar adjustments do not need any market support
C
Because percentage adjustments produce larger values in each case
D
Because most are derived in dollars, and order then does not matter

Why This Is the Correct Answer

Option D is correct because most adjustments are derived in dollar terms, with market conditions and perhaps location as exceptions, and adjustments should be applied the way they were derived. In addition, the sequence of dollar adjustments does not affect the result, which is not always the case for percentage adjustments.

Why the Other Options Are Wrong

Option A: Because percentages are prohibited in residential appraisals

Option A says percentages are prohibited in residential appraisals. Percentage adjustments are not prohibited; market conditions adjustments, for example, are commonly stated as percentages.

Option B: Because dollar adjustments do not need any market support

Option B says dollar adjustments do not need any market support. Adjustments need market support whether it is stated in dollars or as a percentage.

Option C: Because percentage adjustments produce larger values in each case

Option C says percentage adjustments produce larger values in each case. Whether a percentage gives a larger or smaller figure depends on the rate and the base price; it is not a reason to prefer dollar adjustments.

Dollars add in any order

Dollar adjustments simply add up, so order does not matter; percentages multiply, so order can matter.

How to use: Use this when asked why dollar adjustments are preferred or whether adjustment sequence matters.

Exam Tip

Look for the answer that links the form of the adjustment to how it was derived.

Common Mistakes to Avoid

  • -Believing percentage adjustments are prohibited
  • -Assuming dollar adjustments need no support
  • -Ignoring that the order of percentage adjustments can matter

Concept Deep Dive

Analysis

This question tests why dollar adjustments are generally preferred. Adjustments should be applied the way they were derived, and most are derived as dollar amounts. Dollar adjustments also give the same result whatever their order, which is not always true of percentages.

Background Knowledge

Adjustments are applied in the form in which they were derived. Because most are measured as dollar contributions, dollar adjustments are generally preferred. When percentage adjustments are used, their order can change the result because each applies to a different base.

Real-World Application

An appraiser measures garage and bathroom contributions in dollars from paired sales and enters them as dollar amounts. A market conditions adjustment derived as a monthly percentage is applied as a percentage.

dollar adjustmentspercentage adjustmentssequence of adjustmentsderivationsales comparison grid
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