Scaling
Scaling adjusts values proportionally. Used for unit conversion, population normalization, and size comparison.
Practice This ConceptUnderstanding Scaling
Scaling means adjusting a number by a consistent factor. If you double the input, you double the output. In EPSO, scaling appears when converting currencies, adjusting for population differences, or comparing countries of different sizes.
Formula
$scaled = original \times factor$
Key Rules
- Scaling preserves ratios
- To scale up: multiply by factor > 1
- To scale down: multiply by factor < 1 (or divide)
- Converting units is scaling: km to m = x 1000
Examples in Action
1
1576 / 586
=
2.69x
Germany exports are 2.69x French exports
2
100 x 1.05
=
105
Scaling up by 5%
3
200 x 0.75
=
150
Scaling down to 75%
Common Errors
- Comparing absolute values when per-capita is needed
- Using the wrong scaling factor
- Scaling one part but not the other
Pro Tip
When comparing countries of very different sizes, ask: should I scale to per-capita or keep absolute? The question tells you.