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Percentage Change

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Increase and decrease percentage - definition

Increase Percentage: We can find the increase percentage by calculating the difference between a final value and the initial value, expressed as a percentage of the initial value. 
Percentage increased

Decrease Percentage: We can find the decrease percentage by calculating the difference between a initial value and the final value, expressed as a percentage of the initial value. 
Percentage decreased

Word problems on percentage - example

The cost of an article A is 15% less than that of article B. If their total cost is Rs. 2,775; find the cost of each article.

Solution: 
Let cost of A be Rs and of B be Rs .

Given, Total cost
  
--- (1)

Also, 
cost of an article A is  % less than that of article B
=> --- (2)

From and ,  we get 
 
 


And,  
Hence, cost of A is Rs and of B is Rs

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