If Harper and Grace work together on a project, they will complete it in 6 days. If Grace were to work with Mason on the same project, they will take a day longer. If Mason and Sophia work together, they will take 150% more time than Harper and Grace. If Harper and Sophia were to work together, how many more days will they take to complete the project compared to Grace and Mason working together?
Time taken by Harper and Grace in percent = 100%
Time taken by Mason and Sophia = 100% + 150% = 250%

Time taken by Harper and Grace = 6 days ---- (1)
Time taken by Grace and Mason = 7 days ---- (2)
Time taken by Mason and Sophia = 250% x 6 = 15 days ---- (3)

(1) + (2) + (3)
Harper + Grace + Grace + Mason + Mason + Sophia → 6 + 7 + 15 = 28 days
Harper + 2 (Grace + Mason) + Sophia → 28 days
Harper + Sophia + 2 x 7 → 28 days
Harper + Sophia → 28 - 14 = 14 days

More days to complete the project for Harper and Sophia compared to Grace and Mason
= 14 - 7
= 7

Answer(s): 7