diff --git a/Sources/MasKit/AppStore/PurchaseDownloadObserver.swift b/Sources/MasKit/AppStore/PurchaseDownloadObserver.swift
index 2f49708..355a91a 100644
--- a/Sources/MasKit/AppStore/PurchaseDownloadObserver.swift
+++ b/Sources/MasKit/AppStore/PurchaseDownloadObserver.swift
@@ -64,7 +64,7 @@ struct ProgressState {
     let phase: String
 
     var percentage: String {
-        String(format: "%.1f%%", arguments: [floor(percentComplete * 100)])
+        String(format: "%.1f%%", floor(percentComplete * 1000) / 10)
     }
 }