If Zoe and Lucas work together on a project, they will complete it in 5 days. If Lucas were to work with Mia on the same project, they will take a day longer. If Mia and Harper work together, they will take 160% more time than Zoe and Lucas. If Zoe and Harper were to work together, how many more days will they take to complete the project compared to Lucas and Mia working together?
Time taken by Zoe and Lucas in percent = 100%
Time taken by Mia and Harper = 100% + 160% = 260%

Time taken by Zoe and Lucas = 5 days ---- (1)
Time taken by Lucas and Mia = 6 days ---- (2)
Time taken by Mia and Harper = 260% x 5 = 13 days ---- (3)

(1) + (2) + (3)
Zoe + Lucas + Lucas + Mia + Mia + Harper → 5 + 6 + 13 = 24 days
Zoe + 2 (Lucas + Mia) + Harper → 24 days
Zoe + Harper + 2 x 6 → 24 days
Zoe + Harper → 24 - 12 = 12 days

More days to complete the project for Zoe and Harper compared to Lucas and Mia
= 12 - 6
= 6

Answer(s): 6