Math

Calculate Percent Increase or Decrease

Built by Kevin Glover · @gloverbuilds · Verified formula

Find the percentage change between two values. See if the change is an increase or decrease and by how much.

📅 Updated April 2026 ✅ Formula verified 📖 4 min read 🆓 Free · No sign-up

In this article

The Percentage Change Formula
Percentage Change vs Percentage Points

Die Formel

Veränderung = ((Neu - Alt) ÷ Alt) × 100. Von 50 € auf 65 €: ((65-50)÷50)×100 = 30% Zunahme. Von 80 € auf 60 €: -25%. Achtung: +50% und -50% heben sich NICHT auf. 100 € +50% = 150 €. 150 € -50% = 75 €. Man braucht +100% um -50% auszugleichen.

Anwendungen

Inflation: VPI-Veränderung. Gehaltsverhandlung: prozentuale Erhöhung. Aktienrendite. In Deutschland ist die Inflationsrate (Statistisches Bundesamt) die Referenz für Tarifverhandlungen und Mieterhöhungen.

⚡ CalcWolf Insight

Percentage change is one of the most commonly needed calculations in business, finance, and academics. "Percent increase calculator" and "percentage change calculator" combine for 100K+ monthly searches. Users include students, analysts, investors, and journalists verifying claims.

Frequently asked questions

Wie berechne ich?▾

((Neu - Alt) ÷ Alt) × 100. Von 200 auf 250: +25%.

Warum heben sich +50% und -50% nicht auf?▾

Verschiedene Bezugsgrößen. 100 +50% = 150. 150 -50% = 75. Die Basis ändert sich.

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Kevin Glover · @gloverbuilds

Founder, CalcWolf · GLVTS · Blickr

All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →