percentage

👨🏻‍🏫 學術台數學

用戶93099

2007-01-29 2:50 am

1)Find the percentage increase or percentage decrease in each of the following .
(c)Increase from $8 to $18 .
2)A is equal to 189 , which is greater than B by 39 . By what percentage is A greater than B ?

更新1:

3)Find the new value in each of the following . (d)Derease 80℃ by 15% .

回答 (3)

英王的教室

2007-01-29 2:56 am

✔ 最佳答案

1 (c).
Percentage increase
=[(18-8)/8]×100%
=(10÷8×100)%
=125%

2.
B=A-39
=189-39
=150
Percentage A greater than B
=(39/150)×100%
=(39÷150×100)%
=26%

2007-02-02 18:37:01 補充：
3 (d).The new value of the temperature=[80(1-15%)]℃=80(0.85)=68℃

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dom123

2007-01-29 3:20 am

1)
(18-8)/8 * 100%
=10/8 * 100%
=125%
So it increases by 125%

2)
39/ (189-39)* 100%
=26%

參考: Me

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Pinky

2007-01-29 2:58 am

1.The increase percentage
=(18-8)/8*100%
=10/8*100%
=125%
2.The percentage
=(189-8)/189*100%
=181/189*100%
~95.77%

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收錄日期: 2021-04-23 16:37:40
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