diff --git a/src/main/java/me/gekoramy/github/quiz/app/preview/PreviewPresenter.java b/src/main/java/me/gekoramy/github/quiz/app/preview/PreviewPresenter.java
index c777d44..b2660f1 100755
--- a/src/main/java/me/gekoramy/github/quiz/app/preview/PreviewPresenter.java
+++ b/src/main/java/me/gekoramy/github/quiz/app/preview/PreviewPresenter.java
@@ -96,7 +96,7 @@ public void initialize(URL location, ResourceBundle resources) {
 
         lblRepo.setText(updateAvailable.getRepo().getName());
 
-        progress.progressProperty().bind(examStarter.getQuestionPool().todoProperty().divide(examStarter.getQuestionPool().total()));
+        progress.progressProperty().bind(examStarter.getQuestionPool().todoProperty().divide((double) examStarter.getQuestionPool().total()));
 
         btnRevert.visibleProperty().bind(Bindings.equal(0, examStarter.getQuestionPool().todoProperty()));
         btnStart.visibleProperty().bind(btnRevert.visibleProperty().not());