Variation en pourcentage
Calculateur en ligne gratuit : Variation en pourcentage. Obtenez un résultat précis et instantané avec formule détaillée.
Variation en pourcentage
Hausse ou baisse entre deux valeurs
Result = ((New - Old) / |Old|) * 100 Aucun calcul pour le moment.
Comment calculer
Result = ((New − Old) ÷ |Old|) × 100
The formula subtracts the original value (Old) from the current value (New) to determine the absolute change. This difference is then divided by the absolute value of the original value (|Old|). Multiplying the result by 100 converts the ratio into a percentage. If the result is positive, it signifies a percentage increase; if negative, it signifies a percentage decrease.
* Exemple: From 50 to 75 → +50% change
Guide de calcul manuel étape par étape
Étape 1 : Saisissez vos données dans le calculateur et visualisez le résultat selon la formule.
Étape 2 : Saisissez vos données dans le calculateur et visualisez le résultat selon la formule.
Étape 3 : Saisissez vos données dans le calculateur et visualisez le résultat selon la formule.
Applications concrètes
Stock Investment Tracking
Evaluating quarterly portfolio growth when a stock price moves from $50 per share to $65 per share (+30% change).
Inflation Rate Measurement
Assessing year-over-year consumer price index shifts from 250 to 265 (+6% inflation rate).
Website Traffic Metrics
Analyzing monthly active user changes when web traffic shifts from 10,000 visitors down to 8,500 visitors (-15% change).
Variation en pourcentageExemples concrets
Comment ça marche
Percentage change measures the relative variation between an old value and a new value over time. Unlike absolute change (which simply tells you the difference in units or dollars), percentage change contextualizes growth or decline relative to the starting point. This makes it an essential metric for stock market performance, inflation metrics, sales growth reporting, and scientific comparisons.
Calculateurs associés
Foire aux questions
What's the difference between percentage change and percentage difference?
Percentage change has a chronological direction because it compares a starting 'old' value to a later 'new' value. Percentage difference is directionless and compares two values without specifying one as the baseline, dividing by their average instead.
Can percentage change be negative?
Yes, a negative percentage change indicates that the new value is smaller than the old value, representing a decrease or loss. For instance, moving from $100 to $80 represents a -20% change.
How do I calculate percentage change by hand?
First, subtract the old value from the new value. Next, divide that result by the old value. Finally, multiply by 100. For example, moving from 40 to 50: (50 - 40) = 10; 10 / 40 = 0.25; 0.25 × 100 = +25%.
How do I calculate percentage change if the original value is negative?
When the original starting value is negative, you must use the absolute value (magnitude) of the original number in the denominator. Otherwise, the sign of the percentage change will be inverted and mathematically misleading.
What does a 100% increase mean?
A 100% increase means the value has exactly doubled. For example, if an item's price goes from $50 to $100, the increase is $50, which is 100% of the original $50 base price.