Monika purchesed a pressure cooker at 9/10th of its selling price and sold it at
8% more than its S.P .find her gain percent.

• c.p=9/10(s.p);
  s.p=s.p+8/100(s.p);
  g%=(s.p-c.p)/c.p*100;
  substitute s.p and c.p values .as they both are in function of s.p.they get cncelled nd you will get answer as 20%.
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