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

Time taken by Sofia and Risa = 7 days ---- (1)
Time taken by Risa and Gabriel = 8 days ---- (2)
Time taken by Gabriel and Lily = 200% x 7 = 14 days ---- (3)

(1) + (2) + (3)
Sofia + Risa + Risa + Gabriel + Gabriel + Lily → 7 + 8 + 14 = 29 days
Sofia + 2 (Risa + Gabriel) + Lily → 29 days
Sofia + Lily + 2 x 8 → 29 days
Sofia + Lily → 29 - 16 = 13 days

More days to complete the project for Sofia and Lily compared to Risa and Gabriel
= 13 - 8
= 5

Answer(s): 5