Answers

2014-01-28T19:39:19+05:30
21 cp= 25sp
cp=25/21sp
loss=cp-sp 
      =25/21sp-sp
      =4/21sp
loss %= (4/21sp)*(21/25sp)*100
           =8% 
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2014-01-28T22:59:47+05:30
CP=21 SP=25 SO LOSS=21-25/25*100=-16

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