油菜籽的出油率是百分之42.2100kg油菜籽可榨油多少千克2100x42%=882千克
2100x42%=2100x0.42=882(千克)答:2100kg油菜籽可榨油882千克.
2100x0.42=882(千克)
2100*42%=883千克