Answer:
Answer is A.
Step-by-step explanation:
Mass of Sodium Chloride in one 50kg person =
grams
Mass of Sodium Chloride in
50kg people =
* 
=
=
So the Answer is A.
You already have the GCF=2
16-10 = 2(4-5) when factored
Hope that helps
6/9 just multiply both parts of the fraction by 3