Triangle TUV was dilated to create triangle T'U'V' using point A as the center of dilation.

Point A is the center of dilation. Triangle T U V is dilated to create smaller triangle T prime U prime V prime. The length of A V prime is 3.2. The length of V prime V is 4.8.

What is the scale factor of the dilation?

Two-fifths
Two-thirds
Three-halves
Eight-fifths