If Sebastian and Jonathan work together on a project, they will complete it in 7 days. If Jonathan were to work with Isaac on the same project, they will take a day longer. If Isaac and Layla work together, they will take 200% more time than Sebastian and Jonathan. If Sebastian and Layla were to work together, how many more days will they take to complete the project compared to Jonathan and Isaac working together?
Time taken by Sebastian and Jonathan in percent = 100%
Time taken by Isaac and Layla = 100% + 200% = 300%

Time taken by Sebastian and Jonathan = 7 days ---- (1)
Time taken by Jonathan and Isaac = 8 days ---- (2)
Time taken by Isaac and Layla = 300% x 7 = 21 days ---- (3)

(1) + (2) + (3)
Sebastian + Jonathan + Jonathan + Isaac + Isaac + Layla → 7 + 8 + 21 = 36 days
Sebastian + 2 (Jonathan + Isaac) + Layla → 36 days
Sebastian + Layla + 2 x 8 → 36 days
Sebastian + Layla → 36 - 16 = 20 days

More days to complete the project for Sebastian and Layla compared to Jonathan and Isaac
= 20 - 8
= 12

Answer(s): 12