1000px = 15%
 
1000px = 15%
 
1000px = 15%
 
1000px = 15%
 
1000px = 15%
 
1000px = 15%
2 columns: 320px / 1000px = 32%
 
2 columns: 320px / 1000px = 32%
 
2 columns: 320px / 1000px = 32%
3 columns: 490px / 1000px = 49%
 
3 columns: 490px / 1000px = 49%
6 columns: 1000px / 1000px = 100%