Why this is mistaken
Ordinary percentage change divides by the comparison amount. A zero base makes that quotient undefined. Retain the dollar change and describe the transition; do not manufacture a percentage.
Where to watch
When this mistake may appear
- A line begins at zero and becomes nonzero.
- Spreadsheet software emits an error or infinity.
Check your work
Your work may contain this mistake if:
- Calls a rise from $0 to $8,000 a 100% increase.
- Suppresses the issue by replacing the base with one.