Slow fps of imported animation (maya)

I have created a character in maya and animated for various poses in a single file.
now after importing the file in unity and after baking its animation, i realized that some of the animations are just too fast for the game.
So I wanted to ask u guys that if there is any way to slow down (change fps) some particular animations using fbx importer > split animations, or any other way ?

Maybe the easiest way, from Unity, is using animation.speed.

From the Script Reference:

// Make all animations in this character play at half speed
for (var state : AnimationState in animation) {
    state.speed = 0.5;