How do change string format?

Im trying to display the results of a quiz as a percentage, currently each right answer is stored and added until the final score is reached and it displays on a results page, i.e. (.4% rather than 40%)

Im thinking I need to declare the string format but Im unsure where or how to do this, Ive tried a few options, but none have worked to this point. Any suggestions are greatly appreciated. [import]uid: 3715 topic_id: 7523 reply_id: 307523[/import]

[code]local text1 = display.newText (“You got a score of:”, 60,70, native.systemFont, 22)
text1:setTextColor (255,255,250)

local text1b = display.newText (""… tostring(finalscore/25) …"%", 110,110, native.systemFont, 36)
text1b:setTextColor (255,255,250)
–> Displays the final score and preceding line [import]uid: 3715 topic_id: 7523 reply_id: 26664[/import]