I believe it could be either B or D.
Aproximately 15%
975-829=146 (difference)
(146/975)×100 = 14.974435897
To prime factorization would be A: 2 X 3 X 5 X 7
Because if your do 2 X 3 it would be 6
Then you do 5 X 7 it would be 35
And 6 X 35 would be 210
AND THAT IS FACTORING THE PROBLEM
whats the figure? I need the background knowledge