We would convert from mg to lb
Let 125 mg = x lb
Recall,
1 mg = 2.2 x 10^-6 lb
125mg = x lb
By crossmultiplying, we have
1 mg * x lb = 125 mg * 2.2 x 10^-6 lb
the mg on both sides of the equation,
x lb = 2.75 x 10^-4 lb
This means that the average mass of 1 kernel is 2.75 x 10^-4 lb
Thus, in a 2.5lb bag, the number of kernels would be
2.5lb/2.75 x 10^-4
= 9090.91 kernels
