A puppy weighs 9 newtons on Earth and about 2 newtons on the planet Namar. A girl weighs 400 newtons on Earth. About how many newtons does the girl weigh on Namar (to the nearest newton)?

why not just set up a simple ratio?

9/2 = 400/x
9x = 800
x = 800/9 newtons

(girl at 400 Newtons ?? mmmhhh)