No. Dividing by two would give equal importance to both numbers, contrary to the supplied instructions. Apply each weight separately: $300,000 x 0.80 = $240,000, and $325,000 x 0.20 = $65,000. Their sum is $305,000.

The equal-weight average would be $312,500, which answers a different question. As a quick check, the required result should be closer to $300,000 because that indication receives most of the weight. The weights must also add to 100%.

Those percentages are invented for this exercise, not a standard appraisal formula. Real reconciliation evaluates the evidence rather than using an automatic average; see the IAAO glossary. Practice another weighted calculation in the sales-comparison worksheet.