If Layla and Matthew work together on a project, they will complete it in 11 days. If Matthew were to work with Salik on the same project, they will take a day longer. If Salik and Jonathan work together, they will take 200% more time than Layla and Matthew. If Layla and Jonathan were to work together, how many more days will they take to complete the project compared to Matthew and Salik working together?
Time taken by Layla and Matthew in percent = 100%
Time taken by Salik and Jonathan = 100% + 200% = 300%

Time taken by Layla and Matthew = 11 days ---- (1)
Time taken by Matthew and Salik = 12 days ---- (2)
Time taken by Salik and Jonathan = 300% x 11 = 33 days ---- (3)

(1) + (2) + (3)
Layla + Matthew + Matthew + Salik + Salik + Jonathan → 11 + 12 + 33 = 56 days
Layla + 2 (Matthew + Salik) + Jonathan → 56 days
Layla + Jonathan + 2 x 12 → 56 days
Layla + Jonathan → 56 - 24 = 32 days

More days to complete the project for Layla and Jonathan compared to Matthew and Salik
= 32 - 12
= 20

Answer(s): 20