要式+STEP
1. Mr Lee bought a flat in 1995 for $ 720 000 . He sold it in 1999 for $ 960 000. Express his profit as a percentage of the 1995 price.
2. The selling price of an article os $3 600 during a 40% off sale. Find the marked price.
3. Find the simple interest if $ 5 000 is deposited for3 years at 6% p.a.
3題數..( 升中一功課 . 英文 )
2007-08-10 4:41 am
回答 (2)
2007-08-10 5:07 am
✔ 最佳答案
1)(960000 - 720000) / 720000 * 100%
= 33.33%
2)
let x be marked price
(x - 3600) / x * 100% = 40%
(x - 3600) / x = 0.4
x - 3600 = 0.4x
0.6x = 3600
x = 6000
3)
(5000)(6%)(3)
= 900
2007-08-10 5:09 am
1. Profit percentage
= (960000 - 720000) / 720000 * 100% = 100/3 % ~ 33.33%
2. Let $x be the marked price
x (1 - 40%) = 3600
x * 0.6 = 3600
x = 6000
The marked price is $6000.
3. The simple interest
= $5000 * 6% * 3
= $5000 * 0.06 * 3
= $900
= (960000 - 720000) / 720000 * 100% = 100/3 % ~ 33.33%
2. Let $x be the marked price
x (1 - 40%) = 3600
x * 0.6 = 3600
x = 6000
The marked price is $6000.
3. The simple interest
= $5000 * 6% * 3
= $5000 * 0.06 * 3
= $900
收錄日期: 2021-04-13 01:02:37
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