1) A is 20% more than B, what prcentage of A is B?
如果A=100,
B=100ｘ(1+20%)
岩嗎`? 其實應該點計-口-?
2)If number A increases by 25%, it is equal to number.
Find the percentage of the original value of A to B. <唔識解-3-
點計呢?
THZ`
2條f.1 maths題:] (急)
2008-06-04 5:02 am
回答 (3)
2008-06-04 5:39 am
✔ 最佳答案
１：A = 120% B = 100%100/120
A = 83.333333333333.......% ; B = 100%
2 : A(1 + 0.25) = B
所以 X(1.25) = 1
X = 1/1.25
X = 0.8
A : B = 80% : 100% (The original value)
2008-06-05 08:16:17 補充：
１：A = 120% B = 100%
100/120
A = 100% ; Ｂ = 83.3.....%33333333333..
sorry 攪錯咗Ａ，Ｂ
2008-06-05 08:17:24 補充：
B = 83.333333333333333333333333333333333333..........%
參考: byfrgnhvt
2008-06-04 6:17 am
唔岩，因為A係多過B，所以計B時唔應該係(1+20%)，應該係(1-20%) 。
仲有係percentage唔係prcentage
1) The percentage of A is B,
If A = 100
∴B = 100 x (1-20%)
B = 100 x 80%
B= 80
what percentage of A is B? ←依我理解就係B的百分比係A既幾多? (既A做分母，B做分子，再乘以100%)
80/100 x 100%
=80 %
2)你係咪打漏左d咩?
仲有係percentage唔係prcentage
1) The percentage of A is B,
If A = 100
∴B = 100 x (1-20%)
B = 100 x 80%
B= 80
what percentage of A is B? ←依我理解就係B的百分比係A既幾多? (既A做分母，B做分子，再乘以100%)
80/100 x 100%
=80 %
2)你係咪打漏左d咩?
參考: 自己
2008-06-04 5:44 am
1)
A比B多20%
即是
A = (1+20%) B
現在要找 B = ?% of A 即是把B 以A來表達
B = A/(1+20%)
B = 1A/1.2
B = (1/1.2)(A)(100%)
B = 83.33% of A
2
當A增加25% 時 B = A
找出原來的A 為 B的百分之幾 (%)
A(1+25%) = B
B = 1.25A
找百分比 即是把 ( 原來的數/新的數] 乘100%
A/B x 100%
= A/(1.25A) x100%
= 4/5 x100% (A約簡了)
= 80%
A比B多20%
即是
A = (1+20%) B
現在要找 B = ?% of A 即是把B 以A來表達
B = A/(1+20%)
B = 1A/1.2
B = (1/1.2)(A)(100%)
B = 83.33% of A
2
當A增加25% 時 B = A
找出原來的A 為 B的百分之幾 (%)
A(1+25%) = B
B = 1.25A
找百分比 即是把 ( 原來的數/新的數] 乘100%
A/B x 100%
= A/(1.25A) x100%
= 4/5 x100% (A約簡了)
= 80%
收錄日期: 2021-04-13 15:39:03
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080603000051KK02420