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Percentage

  • Description: 794.png 
  • Description: 799.png 
  • If the price of a commodity increases by r %, then reduction in consumption, so as not to increase the expenditure is Description: 804.png.
  • If the price of a commodity decreases by r%, then the increase in consumption so as not to decrease the expenditure is Description: 809.png 
  • First Increase and then decrease :
  • If the value is first increased by x % and then decreased by y % then there is Description: 814.png increase or decrease, according to the +ve or –ve sign respectively.
  • Student and Marks
  • The percentage of passing marks in an examination is x%. If a candidate who scores y marks fails by z marks, then the maximum marks M = Description: 819.png 
  • A candidate scoring x % in an examination fails by ‘a’ marks, while another candidate who scores y% marks gets ‘b’ marks more than the minimum required passing marks. Then the maximum marks Description: 824.png.
  • If A’s income is r % more than that of B, then B’s income is less than that of A byDescription: 829.png 
  • If A’s income is r % less than that of B, then B’s income is more than that of A byDescription: 834.png 




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