A man sold two books at the same price. On the first book he gained 20% and on the second he gained 30%. By what percent is the cost price of first book more than that of the cost price of the second book?
A. 33.33%
B. 8.33%
C. 28.56%
D. 14.28%
E. 16.66%

• can someone post the solution to this question please?
• 10 years agoHelpfull: Yes(0) No(0)
• let 100 is s.p.
  100=b1+b1*(20/100)---->b1=83.33
  100=b2+b2*(30/100)--------->>b2=76.99.
  
  calculate %..
  
• 9 years agoHelpfull: Yes(0) No(2)
• by anuj calculation
  b1=83.33,b2=76.99,b2-b1=6.34
  %=6.34/76.99*100=8.23%
• 6 years agoHelpfull: Yes(0) No(0)