Misconception · MIS:dollar-and-percentage-change-are-interchangeable

Mistaken idea “Dollar change and percentage change tell the same story”

Mistaken reasoning: This mistake reports only an absolute or relative change and treats it as a complete multi period comparison.

Updated Aug 21, 2026 Review due Nov 7, 2026

Why this is mistaken

Dollar change preserves scale; percentage change expresses movement relative to a comparison amount. A base-100 index answers a third question. Retain labels and original amounts so a reader can see all three relationships.

Where to watch

When this mistake may appear

  • Two companies of different sizes report changes.
  • A later period has a larger amount but a lower growth rate.
Check your work

Your work may contain this mistake if:

  • Calls a $35,000 increase larger than a $45,000 increase without considering bases.
  • Reports 126.67 as 126.67% growth instead of a base-100 index.