3. an article costs $120 and is marked at $160.
(a) Find the percentage profit.
(b) A discount of x% is then given.
(i)find the selling price in terms of x
(ii) Find the maximum value of x so that it cannot be a loss
Maths f.3 ( show steps) percentage 2
2008-11-08 7:56 pm
回答 (2)
2008-11-08 8:16 pm
✔ 最佳答案
A (160-120)/120=40/120
=1/3
=66.7%
B) 160．X%=Y
160．X/100=Y
X=(Y/160)100
c) 160．X%(>=)120
x%(>=)3/4
X/100(>=)3/4
4X(>=)30
x(>=)75
參考: me
2008-11-08 8:12 pm
a) % profit = (160-120)/120 x 100% = 40/120 x 100% = 100/3 %.
b) selling price = marked price x ( 1 - % discount) = 160(1-x)
ii) 160(1-x) > 120
160 - 160x > 120
40 > 160x
1/4 > x
So max. x = 1/4 = 25%.
b) selling price = marked price x ( 1 - % discount) = 160(1-x)
ii) 160(1-x) > 120
160 - 160x > 120
40 > 160x
1/4 > x
So max. x = 1/4 = 25%.
收錄日期: 2021-04-25 22:37:44
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