If Isaiah and Elijah work together on a project, they will complete it in 8 days. If Elijah were to work with William on the same project, they will take a day longer. If William and Riordan work together, they will take 200% more time than Isaiah and Elijah. If Isaiah and Riordan were to work together, how many more days will they take to complete the project compared to Elijah and William working together?
Time taken by Isaiah and Elijah in percent = 100%
Time taken by William and Riordan = 100% + 200% = 300%

Time taken by Isaiah and Elijah = 8 days ---- (1)
Time taken by Elijah and William = 9 days ---- (2)
Time taken by William and Riordan = 300% x 8 = 24 days ---- (3)

(1) + (2) + (3)
Isaiah + Elijah + Elijah + William + William + Riordan → 8 + 9 + 24 = 41 days
Isaiah + 2 (Elijah + William) + Riordan → 41 days
Isaiah + Riordan + 2 x 9 → 41 days
Isaiah + Riordan → 41 - 18 = 23 days

More days to complete the project for Isaiah and Riordan compared to Elijah and William
= 23 - 9
= 14

Answer(s): 14