If Scarlett and Nathan work together on a project, they will complete it in 5 days. If Nathan were to work with Gavin on the same project, they will take a day longer. If Gavin and Harris work together, they will take 120% more time than Scarlett and Nathan. If Scarlett and Harris were to work together, how many more days will they take to complete the project compared to Nathan and Gavin working together?
Time taken by Scarlett and Nathan in percent = 100%
Time taken by Gavin and Harris = 100% + 120% = 220%

Time taken by Scarlett and Nathan = 5 days ---- (1)
Time taken by Nathan and Gavin = 6 days ---- (2)
Time taken by Gavin and Harris = 220% x 5 = 11 days ---- (3)

(1) + (2) + (3)
Scarlett + Nathan + Nathan + Gavin + Gavin + Harris → 5 + 6 + 11 = 22 days
Scarlett + 2 (Nathan + Gavin) + Harris → 22 days
Scarlett + Harris + 2 x 6 → 22 days
Scarlett + Harris → 22 - 12 = 10 days

More days to complete the project for Scarlett and Harris compared to Nathan and Gavin
= 10 - 6
= 4

Answer(s): 4