The hypotenuse of a triangle was 7 cm and after a dilation the final hypotenuse was 1.05 cm. What is the scale factor

The scale factor can be determined by dividing the final hypotenuse by the original hypotenuse.

Scale factor = final hypotenuse / original hypotenuse
Scale factor = 1.05 cm / 7 cm
Scale factor = 0.15