Answer:
15 cups of water
Step-by-step explanation:
The original recipe has 1 cup of lemon juice. If she has 2.5, you must multiply the 1 cup of lemon juice by 2.5, and everything else in the recipe by 2.5 as well. When you do that, you get:
1*2.5=2.5 = lemon juice amount
6*2.5=15 = water amount
2*2.5=5 = sugar amount
Hope this helps
