'string to percent' test covered
'string to percent' test covered

Change-Id: Ib18e28cba03c7032e8a446449b2839e7b7534133

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core