If Natalie and Caleb work together on a project, they will complete it in 10 days. If Caleb were to work with Zoe on the same project, they will take a day longer. If Zoe and Dylan work together, they will take 200% more time than Natalie and Caleb. If Natalie and Dylan were to work together, how many more days will they take to complete the project compared to Caleb and Zoe working together?
Time taken by Natalie and Caleb in percent = 100%
Time taken by Zoe and Dylan = 100% + 200% = 300%

Time taken by Natalie and Caleb = 10 days ---- (1)
Time taken by Caleb and Zoe = 11 days ---- (2)
Time taken by Zoe and Dylan = 300% x 10 = 30 days ---- (3)

(1) + (2) + (3)
Natalie + Caleb + Caleb + Zoe + Zoe + Dylan → 10 + 11 + 30 = 51 days
Natalie + 2 (Caleb + Zoe) + Dylan → 51 days
Natalie + Dylan + 2 x 11 → 51 days
Natalie + Dylan → 51 - 22 = 29 days

More days to complete the project for Natalie and Dylan compared to Caleb and Zoe
= 29 - 11
= 18

Answer(s): 18