428/640 = 107/160
160
25% 25% of 640 is 160
4 x 160 stones = 640 stones 4 x 160 words = 640 words 4 x 160 cars = 640 cars 4 x 160 flies = 640 flies 4 x 160 ml = 640 ml
640*.25=160
640 divided by 1/4 = 160
2/8 of 640 is 160.
640/52 = 160/13
640/4 = 160
640/1
160
160