Data Interpretation & Graph Analysis Strategy Guide for Professional Level CSE

Percentage Increase & Decrease Shortcut Formula

Data interpretation questions frequently ask for the **percentage growth or decline** between two years:

$$\text{Percentage Change} = \frac{\text{New Value} - \text{Old Value}}{\text{Old Value}} \times 100\%$$

Example:

*If government budget allocation grew from ₱40 Million in 2024 to ₱50 Million in 2025, what was the percentage increase?*

$$\text{Percentage Increase} = \frac{50 - 40}{40} \times 100\% = \frac{10}{40} \times 100\% = 25\%$$