Answer:
66.6 kg
Step-by-step explanation:
The weight of a person at Earth's surface is given by
![W=mg](https://img.qammunity.org/2020/formulas/physics/middle-school/oq8az7xjzl9h2d74orlcj0v1zet7mbhsgr.png)
where
m is the mass of the person
is the acceleration of gravity
The person in the problem has a weight of
W = 653 N
Therefore, we can rearrange the equation to find his mass:
![m=(W)/(g)=(653)/(9.8)=66.6 kg](https://img.qammunity.org/2020/formulas/physics/middle-school/ufaf6rftdeou6ay5f2q5whirnuuh18d2n5.png)