Why coverages in sonar site are differ in percentage?

If I open the this link http://localhost:9000/projects the coverage it shows is 47%

When I open http://localhost:9000/dashboard?id=Rugid_Account_Service_Analysis the coverage it shows 100% am a bit confused.

“New code” coverage 100% - and on changing to “Overall Coverage” I would expect also 47% in the project dashboard (like already in the project overview).