If Joshua and Amelia work together on a project, they will complete it in 10 days. If Amelia were to work with Emma on the same project, they will take a day longer. If Emma and Jayden work together, they will take 180% more time than Joshua and Amelia. If Joshua and Jayden were to work together, how many more days will they take to complete the project compared to Amelia and Emma working together?
Time taken by Joshua and Amelia in percent = 100%
Time taken by Emma and Jayden = 100% + 180% = 280%

Time taken by Joshua and Amelia = 10 days ---- (1)
Time taken by Amelia and Emma = 11 days ---- (2)
Time taken by Emma and Jayden = 280% x 10 = 28 days ---- (3)

(1) + (2) + (3)
Joshua + Amelia + Amelia + Emma + Emma + Jayden → 10 + 11 + 28 = 49 days
Joshua + 2 (Amelia + Emma) + Jayden → 49 days
Joshua + Jayden + 2 x 11 → 49 days
Joshua + Jayden → 49 - 22 = 27 days

More days to complete the project for Joshua and Jayden compared to Amelia and Emma
= 27 - 11
= 16

Answer(s): 16