What is four fifths mines two thirds sorry for asking

Need on this one asap im almost done with this subject

Ateacher noticed 5/8 of the students were wearing either blue shorts or white shorts. write two different ways this could be done.

With this question substitute t=3 and t=5 to determine if the two expressions are equivalent. 4(t + 3) 4t+12 which statements are true? check all that apply. a. the value of both expressions when t =5 is 32. b. the two expressions are not equivalent. c. the value of both expressions when t=3 is 15. d. the value of both expressions when t=5 is 23. e. the two expressions are equivalent. f. the value of both expressions when t=3 is 24.