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

A Fórmula

Variação = ((Novo - Antigo) ÷ Antigo) × 100. De R$50 para R$65: ((65-50)÷50)×100 = 30% de aumento. De R$80 para R$60: -25%. Atenção: +50% e -50% NÃO se anulam. R$100 +50% = R$150. R$150 -50% = R$75. Precisa de +100% para compensar -50%.

Aplicações

Inflação: IPCA acumulado 12 meses. Investimentos: rentabilidade. Salário: negociação de aumento. No Brasil, a variação do IPCA é a referência para reajustes contratuais.

⚡ 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

Como calcular?▾

((Novo - Antigo) ÷ Antigo) × 100. De R$200 para R$250: +25%.

Por que +50% e -50% não se anulam?▾

Porque são calculados sobre bases diferentes. 100 +50% = 150. 150 -50% = 75. Base muda.

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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 →