That's efficiency. There's no law that it must be stated in percent.
I think that the answer to that is true hope that helps
The answer is A bc I did the quiz and I got it right
Since force = mass X acceleration, then the force he excerts on the earth (aka his weight) equals his mass times the force of gravity.
Therefore
W = (66 kg) X (9.8 m/ss)
W = 646.8 kgm/ss
kg m/ss are also known as Newtons, so your answer is...
646.8 N
