If Wyatt and Rebecca work together on a project, they will complete it in 10 days. If Rebecca were to work with Harris on the same project, they will take a day longer. If Harris and Isabella work together, they will take 140% more time than Wyatt and Rebecca. If Wyatt and Isabella were to work together, how many more days will they take to complete the project compared to Rebecca and Harris working together?
Time taken by Wyatt and Rebecca in percent = 100%
Time taken by Harris and Isabella = 100% + 140% = 240%

Time taken by Wyatt and Rebecca = 10 days ---- (1)
Time taken by Rebecca and Harris = 11 days ---- (2)
Time taken by Harris and Isabella = 240% x 10 = 24 days ---- (3)

(1) + (2) + (3)
Wyatt + Rebecca + Rebecca + Harris + Harris + Isabella → 10 + 11 + 24 = 45 days
Wyatt + 2 (Rebecca + Harris) + Isabella → 45 days
Wyatt + Isabella + 2 x 11 → 45 days
Wyatt + Isabella → 45 - 22 = 23 days

More days to complete the project for Wyatt and Isabella compared to Rebecca and Harris
= 23 - 11
= 12

Answer(s): 12