EXPLANATION
Let's see the facts:
Randy's gross salary = 760/week
Taxed rate = 16% = 16/100 = 0.16 (in decimal form)
The amount tax paid is as follows:
Amount tax paid = tax%(in decimal form) * gross salary
Replacing terms:
Amount tax paid = 0.16 * 760 = $121.6
The net salary is the difference between the gross salary and the amount tax paid:
Net salary = $760 - $121.6 = $638.4
The net salary is $638.4