diff --git a/kcalc_core.cpp b/kcalc_core.cpp
--- a/kcalc_core.cpp
+++ b/kcalc_core.cpp
@@ -876,6 +876,7 @@
 
 void CalcEngine::Reset()
 {
+    percent_mode_ = false;
     error_ = false;
     last_number_ = KNumber::Zero;