diff --git a/src/statistiques/computeELPeriodStats.ts b/src/statistiques/computeELPeriodStats.ts
index cf299e1..38940a3 100644
--- a/src/statistiques/computeELPeriodStats.ts
+++ b/src/statistiques/computeELPeriodStats.ts
@@ -78,7 +78,9 @@ function valueWithEvol(
 
 function evolPercent(current: number, previous: number | undefined): number {
   if (previous === undefined) return NaN;
-  return (100 * evol(current, previous)) / previous;
+  const evolValue = evol(current, previous);
+  if (evolValue === 0) return 0;
+  return (100 * evolValue) / previous;
 }
 
 function evol(current: number, previous: number | undefined): number {