do any one know this:
1)Tina eats 23% of a box of candies. If there are 154 candies left , find the original number of candies.(maths)
2)Siu Kei spends 60% of his pocket money on meals ,22% on books and 18% on transport.
a)If he spend $15.3 on transport last week,find the amount of his pocket money last week.
b)Find the amounts spent on meals and books last week.(maths)
can you help me??????
2012-08-27 12:33 am
回答 (1)
2012-08-27 12:41 am
✔ 最佳答案
Let y be the original number of the candies .y -23%y = 154
77%y = 154
y =154 除以77%
y =200
The original number of the candies is 200 .
2012-08-26 16:46:50 補充：
Let x be the amount of the pocket money last week .
18%x = 15.3
x = 15.3 除以18%
x = 85
the amount of the pocket money last week was $85
2012-08-26 16:50:58 補充：
The amounts spent on meals and books last week was :
85 x (60%+ 22% )
=85x82%
=$ 69.7
收錄日期: 2021-04-21 00:13:04
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20120826000051KK00394