This is split off from bug 164728 attachment 198570 [details] contains numbers formatted as percentage. If an existing chart is created with data labels and copy-pasted into Writer, then the values format changes from percentage to fraction. 1. Open attachment 198570 [details] 2. Copy one of the existing charts 3. Open a new Writer document and paste -> the data labels formatting changes from percentage to hundreths. This happens even after merging https://gerrit.libreoffice.org/c/core/+/180600