mathz 急! only 1 question!
2008-01-06 12:40 am
Mary is 20% heavier than Sam .by how much per cent is Sam lighter than Mary?
回答 (4)
2008-01-06 12:50 am
✔ 最佳答案
1/(1+20%)=1/1.2
=0.8333...
=83.33% to 2 d.p
1-83.33%
=16.67%
2008-01-06 12:54 am
suppose Sam is 100kg
then Mary weighs = 100*(1+20%)=120kg
So The percentage
= 1-(100/120*100%)
=1-83.3333%
=16 2/3%
then Mary weighs = 100*(1+20%)=120kg
So The percentage
= 1-(100/120*100%)
=1-83.3333%
=16 2/3%
2008-01-06 12:53 am
Sam lighter than Mary20%
題解:瑪莉重過森20%,問森輕過瑪莉幾多百分點?
因為:瑪莉重過森=森輕過瑪莉
所以:瑪莉重過森20%=森輕過瑪莉20%
題解:瑪莉重過森20%,問森輕過瑪莉幾多百分點?
因為:瑪莉重過森=森輕過瑪莉
所以:瑪莉重過森20%=森輕過瑪莉20%
參考: 自己
2008-01-06 12:45 am
1 - 20%
= 100% - 20%
= 80%
= 100% - 20%
= 80%
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https://hk.answers.yahoo.com/question/index?qid=20080105000051KK02754