Please answer and explain the link below

Which expression will have the same sum as 3_8 + 1/4?

Which number completes the inequality? 2/3 < _ < 7/9

Aresearcher believes increased perceived control influence the well-being of residents at a nursing home. to test this , she allowed one group of residents to have control over their daily lies, (where to eat etc) . the other group of 5 residents had these deceisions made by staff. the resident's feelings of well-being were measured on a 10 point scale at the end of a one month trial period. is there a difference on well-being?