I need help on this one, I’ll really appreciate your hard work! :)

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

The image of abc is a'b'c. what transformations would result in this image? abc is reflected over the line x = 1, then is rotated -90° around the origin. abc is reflected over the line y = x - 1, then t: (x, y) → (x - 1, y - 1). abc is rotated 90° around the origin, then is reflected over the y-axis. abc is rotated -90° around the origin, then is reflected over the line y = -1.

Geometry simularity in right triangles if you need a better pic just ask