Calculateur de pourcentages
Three common percentage jobs on one page: part of a whole, reverse percentage, and change between two numbers.
Cette page traduit la version anglaise. Le moteur de calcul est identique.
Réponse rapide
It applies the three school formulas without adding tax, compounding or currency conversion.
Exemple: 25% of 80 = 20. 20 is 25% of 80. 80 → 100 is a 25% increase.
Les calculs suivent la formule indiquée sur cette page ; l’arrondi et les unités peuvent modifier le dernier chiffre. Traitez le résultat comme une estimation éducative.
* Estimation. Les montants réels peuvent varier selon les hypothèses saisies.
Ce que fait ce calculateur
It applies the three school formulas without adding tax, compounding or currency conversion.
À qui s’adresse-t-il
Anyone checking a discount, a grade or a change between two values.
Comment le calcul fonctionne
X% of Y = X/100 × Y. ‘X is what % of Y’ = X/Y × 100. Change = (new − old) / old × 100.
Formule
part = p/100 × whole; percent = part/whole × 100; change = (new − old)/old × 100
Hypothèses
- Numbers are exact as entered.
- Change uses the first value as the base.
Limites
- Does not handle successive discounts unless you chain the results yourself.
Comment utiliser cet outil
- 1Pick the mode you need.
- 2Enter the two numbers.
- 3Read the result and the short explanation.
FAQ
- Is percentage change the same as percentage points?
- No. A rate moving from 10% to 12% is 2 percentage points and a 20% relative change.