human
Kara mixes cups of sugar and water in the ratio of 1:2 to make one liter of lemonade. Calculate the total number of cups of sugar used if she used 84 cups to make lemonade.
assistant
How many cups of sugar and water are needed to make lemonade? ** The total ratio for the cups of sugar and water needed to make lemonade is 1+2 = <<1+2=3>>3
How many cups of sugar are needed to make one liter of lemonade? ** In the 3 cups needed to make one liter of lemonade, the fraction representing the cups of sugar needed is 1/3.
How many cups of sugar did Kara use? ** If she used 84 cups while making lemonade, she used 1/3*84 = <<84*1/3=28>>28 cups of sugar.
#### 28