diff --git a/akvo/rsr/static/scripts-src/project-editor.js b/akvo/rsr/static/scripts-src/project-editor.js
index db4c1acb0a..ac34a95571 100644
--- a/akvo/rsr/static/scripts-src/project-editor.js
+++ b/akvo/rsr/static/scripts-src/project-editor.js
@@ -615,7 +615,7 @@ function uploadFile(fileInput, maxFileSize, fileType) {
             // Upload progress bar
             request.upload.addEventListener("progress", function(e) {
                 var progressBar = progressBarContainer.querySelector('.progress-bar');
-                var percentage = parseInt(100 - (e.loaded / e.total * 100));
+                var percentage = parseInt(e.loaded / e.total * 100);
                 progressBar.setAttribute('aria-valuenow', percentage);
                 progressBar.style.width = percentage + '%';
                 progressBar.innerHTML = percentage + '%';
diff --git a/akvo/rsr/static/scripts-src/project-editor.jsx b/akvo/rsr/static/scripts-src/project-editor.jsx
index 6caf99a1b7..12a3064d49 100644
--- a/akvo/rsr/static/scripts-src/project-editor.jsx
+++ b/akvo/rsr/static/scripts-src/project-editor.jsx
@@ -615,7 +615,7 @@ function uploadFile(fileInput, maxFileSize, fileType) {
             // Upload progress bar
             request.upload.addEventListener("progress", function(e) {
                 var progressBar = progressBarContainer.querySelector('.progress-bar');
-                var percentage = parseInt(100 - (e.loaded / e.total * 100));
+                var percentage = parseInt(e.loaded / e.total * 100);
                 progressBar.setAttribute('aria-valuenow', percentage);
                 progressBar.style.width = percentage + '%';
                 progressBar.innerHTML = percentage + '%';