How do you work out the GP in % when knowing sales figure,closing inventory,expenditure and opening inventory?

I know how to actually draw the equation to get to the amount figure.


SALES- ( EXPENSES+OPENING INVENTORY) + CLOSING INVENTORY.


But i need to know how to work out a percentage.


Thanks!How do you work out the GP in % when knowing sales figure,closing inventory,expenditure and opening inventory?
You need to find your gross profit by taking your direct expenses away from your turnover (ie, all expenses other than overheads) such as material costs and direct wages.


To convert this to a percentage, you divide your GP by the turnover then multiply this figure by 100.