.
Danica is mixing iced tea and lemonade to make a punch.
She likes the taste of the punch most when she mixes 2 ounces of iced tea
with 5 ounces of lemonade. If she uses this same mixing ratio of iced tea
to lemonade to make 10.5 liters of punch, how many liters of lemonade will she need?
~~~~~~~~~~~~~~~~~~
2 + 5 = 7 equal volumes / (parts) of liquids.
Dividing 10.5 liters by 7, you get = 1.5 liters for the volume of each of the 7 equal liquid parts.
Then it implies that the needed volume of the lemonade is 5*1.5 = 7.5 liters,
giving you the answer.
Solved, with full explanations.