If Isabella and Andrew work together on a project, they will complete it in 10 days. If Andrew were to work with Leah on the same project, they will take a day longer. If Leah and Josiah work together, they will take 70% more time than Isabella and Andrew. If Isabella and Josiah were to work together, how many more days will they take to complete the project compared to Andrew and Leah working together?
Time taken by Isabella and Andrew in percent = 100%
Time taken by Leah and Josiah = 100% + 70% = 170%

Time taken by Isabella and Andrew = 10 days ---- (1)
Time taken by Andrew and Leah = 11 days ---- (2)
Time taken by Leah and Josiah = 170% x 10 = 17 days ---- (3)

(1) + (2) + (3)
Isabella + Andrew + Andrew + Leah + Leah + Josiah → 10 + 11 + 17 = 38 days
Isabella + 2 (Andrew + Leah) + Josiah → 38 days
Isabella + Josiah + 2 x 11 → 38 days
Isabella + Josiah → 38 - 22 = 16 days

More days to complete the project for Isabella and Josiah compared to Andrew and Leah
= 16 - 11
= 5

Answer(s): 5