If Samuel and Leah work together on a project, they will complete it in 7 days. If Leah were to work with Lilian on the same project, they will take a day longer. If Lilian and Levi work together, they will take 200% more time than Samuel and Leah. If Samuel and Levi were to work together, how many more days will they take to complete the project compared to Leah and Lilian working together?
Time taken by Samuel and Leah in percent = 100%
Time taken by Lilian and Levi = 100% + 200% = 300%

Time taken by Samuel and Leah = 7 days ---- (1)
Time taken by Leah and Lilian = 8 days ---- (2)
Time taken by Lilian and Levi = 300% x 7 = 21 days ---- (3)

(1) + (2) + (3)
Samuel + Leah + Leah + Lilian + Lilian + Levi → 7 + 8 + 21 = 36 days
Samuel + 2 (Leah + Lilian) + Levi → 36 days
Samuel + Levi + 2 x 8 → 36 days
Samuel + Levi → 36 - 16 = 20 days

More days to complete the project for Samuel and Levi compared to Leah and Lilian
= 20 - 8
= 12

Answer(s): 12