1) Last month, a computer wholesaler sold 1200 motherboards at $500 each. This month he has sold 200 pieces more, but the price has dropped by 17%. What is the percentage change?
列式+過程 PLZ,,, THX =]
F1 MATHS (20 FUN)
2007-05-06 12:42 am
回答 (1)
2007-05-06 12:58 am
✔ 最佳答案
佢有冇話 (corr.to 3sig fig ) ?2007-05-05 17:53:18 補充：
我都係 chace_lam個答案//if corr.to 3sig fig 就係 -3.17 % !
2007-05-05 17:58:51 補充：
因為佢條題目冇講 decrease percentage ...so..成條式應該係..the new price of the motherboards :500 * (1-17%) =$415 the percentage change :$415 * (1200 200) - (1200* $500) / (1200* $500) 再乘 100 %581000-600000/600000 再乘 100 %= - 3.17 % (corr.to 3sig fig )
收錄日期: 2021-04-12 20:26:16
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070505000051KK03313