The two numbers must be expressed in the same unit. To convert 495g to kg, it will be divided by 1000
495g = 4951000\frac{495}{1000}1000495
= 0.495kg
To express in percentage, 0.495 will be divided by 16.5 and then multiplied by 100
% will be added to the answer 0.495016.5\frac{0.4950}{16.5}16.50.4950 x 100
= 3%
