you use 8 fluid ounces the fruit juice in a recipe to make 64 fluid ounces of fruit punch. If you punch you can buy at the store has 10% real fruit juice. Which has a higher percent of fruit juice?
To get the percentage of 8 fl oz you cross multiply 8 fl oz*100%/64 fl oz Fl oz cross each other out 800%/64 =12.5% (homemade fruit punch has a higher percentage of real fruit juice)