If Lucas and Amelia work together on a project, they will complete it in 9 days. If Amelia were to work with Jack on the same project, they will take a day longer. If Jack and Lily work together, they will take 200% more time than Lucas and Amelia. If Lucas and Lily were to work together, how many more days will they take to complete the project compared to Amelia and Jack working together?
Time taken by Lucas and Amelia in percent = 100%
Time taken by Jack and Lily = 100% + 200% = 300%

Time taken by Lucas and Amelia = 9 days ---- (1)
Time taken by Amelia and Jack = 10 days ---- (2)
Time taken by Jack and Lily = 300% x 9 = 27 days ---- (3)

(1) + (2) + (3)
Lucas + Amelia + Amelia + Jack + Jack + Lily → 9 + 10 + 27 = 46 days
Lucas + 2 (Amelia + Jack) + Lily → 46 days
Lucas + Lily + 2 x 10 → 46 days
Lucas + Lily → 46 - 20 = 26 days

More days to complete the project for Lucas and Lily compared to Amelia and Jack
= 26 - 10
= 16

Answer(s): 16