If Samantha and David work together on a project, they will complete it in 5 days. If David were to work with Joshua on the same project, they will take a day longer. If Joshua and Harper work together, they will take 180% more time than Samantha and David. If Samantha and Harper were to work together, how many more days will they take to complete the project compared to David and Joshua working together?
Time taken by Samantha and David in percent = 100%
Time taken by Joshua and Harper = 100% + 180% = 280%

Time taken by Samantha and David = 5 days ---- (1)
Time taken by David and Joshua = 6 days ---- (2)
Time taken by Joshua and Harper = 280% x 5 = 14 days ---- (3)

(1) + (2) + (3)
Samantha + David + David + Joshua + Joshua + Harper → 5 + 6 + 14 = 25 days
Samantha + 2 (David + Joshua) + Harper → 25 days
Samantha + Harper + 2 x 6 → 25 days
Samantha + Harper → 25 - 12 = 13 days

More days to complete the project for Samantha and Harper compared to David and Joshua
= 13 - 6
= 7

Answer(s): 7