diff --git a/app/src/main/cpp/PhoneDevice.cpp b/app/src/main/cpp/PhoneDevice.cpp
index cd423bae..8fd64279 100644
--- a/app/src/main/cpp/PhoneDevice.cpp
+++ b/app/src/main/cpp/PhoneDevice.cpp
@@ -1221,7 +1221,7 @@ bool CPhoneDevice::OnImageReady(cv::Mat& mat)
                              it->label, item.name.c_str(), it->x, it->y, it->w, it->h, pt.x, pt.y, textSize.width, textSize.height);
                     ALOGI(buf);
 #endif
-                    ft2->putText(mat, item.name + std::to_string((int)(it->prob * 100.0)), pt, fontSize, textColor, thickness, cv::LINE_AA, false, true);
+                    ft2->putText(mat, item.name + std::to_string((int)(it->prob * 100.0)) + "%", pt, fontSize, textColor, thickness, cv::LINE_AA, false, true);
                 }
                 ++it;
             }