Question

ellen had 25 hair clips.7 of them and the rest were purple , what precent of the hair clips were blue

Answer 1

28% If you take 7 and divide it by 25 (complete amount) and times it by 100 you get the percentage.

Answer 2

Answer=28%
Assuming you meant to say that 7 of them were blue, and the rest were purple...

  7      x
___=___
 25   100

cross multiply
25x=700
x=28