diff --git a/addons/website_slides/models/slide_channel.py b/addons/website_slides/models/slide_channel.py
index f504ecc03fd..28b53c89dec 100644
--- a/addons/website_slides/models/slide_channel.py
+++ b/addons/website_slides/models/slide_channel.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
-import math
 import uuid
 
 from odoo import api, fields, models, tools, _
@@ -237,7 +236,7 @@ class Channel(models.Model):
         for record in self:
             completed, completion = mapped_data.get(record.id, (False, 0))
             record.completed = completed
-            record.completion = math.ceil(100.0 * completion / (record.total_slides or 1))
+            record.completion = round(100.0 * completion / (record.total_slides or 1))
 
     @api.depends('upload_group_ids', 'user_id')
     def _compute_can_upload(self):
diff --git a/addons/website_slides/views/website_slides_templates_profile.xml b/addons/website_slides/views/website_slides_templates_profile.xml
index 8fbfd413f55..262c95a7717 100644
--- a/addons/website_slides/views/website_slides_templates_profile.xml
+++ b/addons/website_slides/views/website_slides_templates_profile.xml
@@ -33,6 +33,8 @@
     <template id="display_course">
         <div class="row">
             <div class="col-12 col-lg-6" t-foreach="courses" t-as="course">
+                <!-- We cannot use the course.channel_id.completion here since the slide.channel.partners are fetched in sudo mode, recompute it -->
+                <t t-set="channel_completion" t-value="round(100.0 * course.completion / (course.channel_id.total_slides or 1))" />
                 <div class="card mb-2">
                     <div class="card-body o_wprofile_slides_course_card_body p-0 d-flex"
                         t-attf-onclick="location.href='/slides/#{slug(course.channel_id)}';">
@@ -59,9 +61,9 @@
 
                             <div class="d-flex align-items-center">
                                 <div class="progress flex-grow-1" style="height:0.5em">
-                                    <div class="progress-bar bg-primary" t-att-style="'width: '+ str(course.completion)+'%'"/>
+                                    <div class="progress-bar bg-primary" t-att-style="'width: '+ str(channel_completion)+'%'"/>
                                 </div>
-                                <small class="font-weight-bold pl-2"><span t-field="course.completion"/> %</small>
+                                <small class="font-weight-bold pl-2"><span t-esc="channel_completion"/> %</small>
                             </div>
                         </div>
                     </div>