Percentage Change
Increase, decrease, difference, and percentage-points — the four ways to express how one value relates to another.
The most useful is percentage points — the UK financial-reporting convention that 'a 2% rise' in a tax rate is actually a 2 percentage-point absolute change but a much larger relative change.
- Percentage increaseFrom X to Y — salary, HPI, prices.
- Percentage decreaseSale prices, price falls, real-terms losses.
- Percentage differenceSymmetric — useful for quote comparisons.
- Percentage pointsBoE rate changes, mortgage rate jumps, tax band moves.
- % of a percentageCompound percentages and nested rates.
- Average / weighted %Combine percentages with different weights.