Posted by Anonymous on .
If 800 mL of a juice drink is 15% grape juice, how much grape juice should be added to make a drink that is 20% grape juice? Use the table below to help.

algebra 
bobpursley,
Hmmmm.
Let V bet the volume added.
(800ml+V).2=800*.15+V
solve for V. 
algebra 
James Korah,
50mL