If Risa and Jeremiah work together on a project, they will complete it in 12 days. If Jeremiah were to work with Mason on the same project, they will take a day longer. If Mason and Zoey work together, they will take 50% more time than Risa and Jeremiah. If Risa and Zoey were to work together, how many more days will they take to complete the project compared to Jeremiah and Mason working together?
Time taken by Risa and Jeremiah in percent = 100%
Time taken by Mason and Zoey = 100% + 50% = 150%

Time taken by Risa and Jeremiah = 12 days ---- (1)
Time taken by Jeremiah and Mason = 13 days ---- (2)
Time taken by Mason and Zoey = 150% x 12 = 18 days ---- (3)

(1) + (2) + (3)
Risa + Jeremiah + Jeremiah + Mason + Mason + Zoey → 12 + 13 + 18 = 43 days
Risa + 2 (Jeremiah + Mason) + Zoey → 43 days
Risa + Zoey + 2 x 13 → 43 days
Risa + Zoey → 43 - 26 = 17 days

More days to complete the project for Risa and Zoey compared to Jeremiah and Mason
= 17 - 13
= 4

Answer(s): 4