中科新闻网金融 保安配备标准:Math!!!!!Math~~~~
来源：百度文库 编辑：中科新闻网 时间：2024/05/22 10:13:22
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%