hi, do you mean in Inventor?
if yes, you can import the file from solidworks and save it as an inventor part.
then you do a new part file, you go to manage menu and choose derive command so in this command you have to select the file you saved before (the original file) you have to specify the scale value you need (the bow below).
And at the end you have to save this new part file and export the stl file.