david bought 100 rubbers for $200 .he sold 30% of them at a price of $4 each and then sold the remaining rubber at $3 each .find the percentage change.
来源：学生作业帮助网 编辑：六六作业网 时间：2024/07/04 06:12:35
davidbought100rubbersfor$200.hesold30%ofthematapriceof$4eachandthensoldtheremainingrubberat$3each.fi
david bought 100 rubbers for $200 .he sold 30% of them at a price of $4 each and then sold the remaining rubber at $3 each .find the percentage change.
david bought 100 rubbers for $200 .he sold 30% of them at a price of $4 each and then sold the remaining rubber at $3 each .find the percentage change.
david bought 100 rubbers for $200 .he sold 30% of them at a price of $4 each and then sold the remaining rubber at $3 each .find the percentage change.
the total money he get from solding all rubbers=30*4+70*3=$330
so the changed percentage=330/200=165%