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
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解决时间 2021-04-11 11:35
- 提问者网友：不爱我么
- 2021-04-10 11:41
最佳答案
- 五星知识达人网友：你可爱的野爹
- 2021-04-10 12:46
the total money he get from solding all rubbers=30*4+70*3=$330
so the changed percentage=330/200=165%
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