神马品牌网正宗西门塔尔牛图片:Math!!!!!Math~~~~
来源：百度文库 编辑：神马品牌网 时间：2024/05/12 17:15:13
SHURGRO fertilizer contains 18% ammonia plus carbon compounds. If 80% of the ammonia contains the chemical element nitrogen, what percent of this fertilizer is nitrogen?
18%*80%=14.4%