Which of the following scale factors would result in a dialation that is a reduction

Dilations stretch or shrink a pre-image. A scale factor greater than 1 will produce an enlargement of the pre-image, and a scale factor less than 1 will produce a reduction of the pre-image. If the scale factor is 1 the pre-image and the image are congruent.

The scale factor between 0 and 1 would result in a dilation that is a reduction.

These are the multiples of 15 but what you are probably asking or what are the factors of 15