百分數及折扣問題

2007-08-10 5:03 pm
1.一張訂價$12000的沙發以九折九扣的優惠價出售,問售價多少?
2.以單利息計算,年利率7%,投資$50000於2年6個月後可獲利息若干?

回答 (4)

2007-08-10 5:20 pm
✔ 最佳答案
1.一張訂價$12000的沙發以九折九扣的優惠價出售,問售價多少?
$12000x99%=$11880
售價:$11880

2.以單利息計算,年利率7%,投資$50000於2年6個月後可獲利息若干?
$50000x7%x2.5=$8750
可獲利息:$8750
2007-08-10 11:55 pm
1. 12000X90%
=10800
2. $50000x7%x[2+(6/12)]
=$3500x2.5
=$8750
參考: me
2007-08-10 5:56 pm
1)12000*0.9*0.9=9720
2)50000*0.07*2.5=8750
2007-08-10 5:14 pm
1. 沙發的售價
= $12000(1-10%)(1-10%)
= $10800(1-10%)
= $9720

2. 可獲利息
= $50000x7%x[2+(6/12)]
= $3500x[2+(6/12)]
= $8750


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