fix progress percentage

GroupedProjections.ijm

@@ -44,7 +44,7 @@ inputName = substring(inputName, 0, dotIndex);
 //FIXME calculate iMax correctly for overlaps
 iMax = floor(nSlices()/subStackSize)+1;
 for (i=0; i<iMax; i++) {
-    print(progressTitle,"\\Update:"+i+"/"+iMax+" substacks ("+(i*100)/100+"%)\n"+getBar(i, 100));
+    print(progressTitle,"\\Update:"+i+"/"+iMax+" substacks ("+round(i/iMax)+"%)\n"+getBar(i, 100));
     start=i*subStackSize+1;
     stop=start+subStackSize+overlap;
     if (stop > nSlices()) {