Learn the percentage increase formula, how it differs from absolute change, and why understanding both is critical for rent negotiations, investment analysis, and business growth tracking.
The Percentage Increase Formula
% Increase = ((New Value - Original Value) ÷ Original Value) × 100. Example: Rent from $1,200 to $1,350: ((1,350 - 1,200) ÷ 1,200) × 100 = 12.5% increase.
Percentage Increase vs Absolute Increase
Absolute increase = raw difference ($150). Percentage = relative change (12.5%). Both are useful — absolute for budgeting, percentage for understanding growth rate.
Real-World Scenarios
Rent increase: $1,200 → $1,350 is 12.5%. The difference of $150/month = $1,800/year. Investment growth: $10,000 → $16,000 over 5 years = 60% total = ~9.9% annualized.
Year-over-Year (YoY) Growth
YoY Growth = ((This Year - Last Year) ÷ Last Year) × 100. This is the most common business growth metric, applied to the same period one year apart.
Inflation-Adjusted Growth: Real vs Nominal
A growth rate that matches inflation isn't real growth. Real Growth ≈ Nominal Growth - Inflation Rate. If salaries rise 4% but inflation is 3%, real growth is only 1%.
Key Takeaways
- Formula: % Increase = ((New - Original) ÷ Original) × 100
- Always divide by the original value — the number you started with
- Track both absolute and percentage change for a complete picture
- Adjust for inflation to see whether you're actually gaining ground
Ready to calculate growth? Use our Percentage Increase Calculator for instant results.