1. The cost of of a book is $40.it is now sold at a profir percentage of 150%.
(a)find the amount of profit.
ANS:
2. (b)Find the selling price of the book.
ANS:
3. 25是125的百分之幾？
A15% B20% c30% d500%
ANS:
4. $60的2.5%是多少？
ANS:
5. Last year, there was 12staff in a department.this year,the number of staff has decreased by 25%.Find the number of staff remaining in the department.
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6. Mary's daily expenses have increased from $40 to $64.Find the percentage increase in the daily expenses.
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7. Mr.Wong sold a vase for $175.Find the cose of the vase if he makes a profit percentage of 40%.
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8. 小明以24%的折扣百分數購買1條裙子,節省了$108.求裙子的售價。
A .132 B. 225 C. 342 D. 450
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9. If the length of each side of a square decreases bu 10%,find the percentage change in the area of the square.
A -10% B-19% C+10% D+20%
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10. Tom sold 2books whick cost $100 each.For the first book,he made a profit of 25%.For the second book,he lost20%.Altogether
A. he gainde 2.5% B. he gainde 5% C. he lost2.5% D. he lost 5%
ANS:
F.1 數學問題 急急急
2012-01-20 5:13 pm
回答 (3)
2012-01-20 8:05 pm
✔ 最佳答案
1.(a)the amount of profit = $40 x 150% = $40x 1.5 = $60
ANS: $60
2.
(b) Selling price = cost + profit = $40 + $60 = $100
ANS: $100
3.
25/125 x100% = 20%
ANS: B20%
4.
$60 x2.5% = $60 x 0.025 = $1.50
ANS: $1.50
5.
12 staff x (100% - 25%) = 12 staff x 75% = 12 x 0.75 =9 staff
ANS: 9 staff
6.
Increase = $64 - $40 = $24
% increase = $24/$40 x 100% = 60%
ANS: percentage increase = 60%
7.
the cost of the vase = $175/140 x 100 = $125
ANS: the cost of the vase = $125
8.
裙子的售價= $108/24 x 100 = $450
ANS: D. 450
9.
suppose the side of square is originally10 units, the are = 10 x 10 = 100 sq. unit
the side of new square 9 units if decrease by 10%, the new area = 9 x 9 = 81 sq. unit
change in the area of the square = 81 – 100 = - 19 sq.unit.
percentage change = -19/100 x 100% = -19%
ANS: B-19%
10.
profit of first book = $100 x 25% = $100 x 0.25 = $25
loss of second book = $100 x -20% = $100 x -0.20 = -$20
Altogether, profit = profit of first book - loss of second book = $25 - $20 = $5
% of profit = $5/$200 x 100% = 2.5%
ANS: A. he gained 2.5%
2012-01-20 6:51 pm
1.The amount of profit is:
40 x 150% -40
=60 - 40
=$202.The selling price of the book is:
40 + 20
=$60
3.B
4. $60的2.5%是:
60 x 2.5%
=60 x 0.025
=1.5
2012-01-20 11:06:50 補充：
5.The number of staff remaining in the department is:
12×(1-25%)
=12 x 75%
=12 x 0.75
=9
6.The percentage increase in the daily expenses is:
(64-40)÷100%
=24÷100%
=0.24
=24%
2012-01-20 11:07:08 補充：
7. The cose of the vase if he makes a profit percentage of 40% is:
175 x (1+40%)
=175 x 140%
=175x 1.4
=$245
8.D
9.C
10.B
40 x 150% -40
=60 - 40
=$202.The selling price of the book is:
40 + 20
=$60
3.B
4. $60的2.5%是:
60 x 2.5%
=60 x 0.025
=1.5
2012-01-20 11:06:50 補充：
5.The number of staff remaining in the department is:
12×(1-25%)
=12 x 75%
=12 x 0.75
=9
6.The percentage increase in the daily expenses is:
(64-40)÷100%
=24÷100%
=0.24
=24%
2012-01-20 11:07:08 補充：
7. The cose of the vase if he makes a profit percentage of 40% is:
175 x (1+40%)
=175 x 140%
=175x 1.4
=$245
8.D
9.C
10.B
2012-01-20 6:11 pm
1)40×150%=$60
2)40×(1+150%)
3)B
4)60×2.5%
5)12×(1-25%)
6)(64-40)÷40
7)175÷(1+40%)
8)D
9)C
10) sorry,I don't know
hope i can help u!!!!
2)40×(1+150%)
3)B
4)60×2.5%
5)12×(1-25%)
6)(64-40)÷40
7)175÷(1+40%)
8)D
9)C
10) sorry,I don't know
hope i can help u!!!!
收錄日期: 2021-04-20 12:06:08
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https://hk.answers.yahoo.com/question/index?qid=20120120000051KK00148