The cost price of 21 articles is equal to thc selling price of 18 articles, profit percentage is?
a 33.33%
b 16.67%
c 25%
d 1.667%

• Let the CP of one article = Rs. C and SP = Rs. S
  
  21C = 18S
  C = (6/7)S
  C < S = Profit
  
  Formula : SP = (100 + P% / 100) CP
  
  S = (100 + P% / 100 ) C
  
  S/C = (100 + P% / 100 )
  
  7/6 = (100 + P% / 100 )
  
  7/6 X 100 = 100 + P%
  
  700/6 - 100 = P%
  
  100/6 = P %
  
  P % = 16.67
  
  
• 12 years agoHelpfull: Yes(10) No(1)
• cost prize =18
  sales prize =21
  profit=3/18*100=16.66
  so anwser is 16.67
• 10 years agoHelpfull: Yes(6) No(0)
• let cp of each item=rs1
  then
  cp of 18 item=rs18
  sp of 18 item is rs 21
  profit=sp-cp=3
  profit%=(3/18)*100=16.67% ans
• 8 years agoHelpfull: Yes(3) No(0)
• If cost price of M articles =cost price of N articles then
  according to formula (M-N)/N*100
  here M=21, N=18
  (21-18)/18*100=16.67
• 10 years agoHelpfull: Yes(1) No(1)
• Suppose cp= 1Rs for each article
  after selling 18 we got our cost for all article now 3 are remaining.
  sp of each article=21/18=1.167Rs
  remaining 3=3*1.67=3.3Rs
  profit=3.5/21=0.16666=16.67%.
• 9 years agoHelpfull: Yes(0) No(0)
• sp*18=cp*21
  sp/cp=21/18
  subtarct 1 both the side:
  sp/cp-1=21/18-1
  profit=3/18=1/6
  profit%=100/6=16.67%
  
• 8 years agoHelpfull: Yes(0) No(0)
• 21-18=3;
  3/18=0.16666;
  0.16666*100=16.67%
• 8 years agoHelpfull: Yes(0) No(0)
• there is quick method... (cp-sp/sp)*100
  so
  21-18/18*100=16.67%
• 8 years agoHelpfull: Yes(0) No(0)