PERCENTAGE SHORTCUT-2 FOR QUICK MATH(less than 2 Min) ●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●● Shortcut (2): If the price of the any product is increased or decreased by “r%” then there is decrease in the consumption so as not to increase the expenditure: “ r/100+ r *100”, (We add when there is increase and subtract when there is decrease in percentage). Various Examples related to this Percentage Shortcuts are given below: Example 1: Suppose if the price of salt falls down by 10%. Now how much percent (%) must increased by the householder so that its consumption remain same as there is no decrease the expenditure. Solution: By using percentage shortcut (2): The increase in consumption= 10/100-10*100 =11.11% (Increase the Consumption) Example 2: If the employee A’s salary is 25% more than the employee B. Then how much percent (%) the salary of Bs is less than that of salary of employee A. Solution: Again by using the Percentage Shortcut (2) we have the following: Bs salary is less than that of employee A salary =25/100+25*100 =20 %(B salary is 20% less than the salary of A) Example 3: Now if the employee As salary is 30% less than that of B then how much percent is Bs salary is more than that of employee A. Solution: Employee Bs salary is more than that of A= 30/100-30*100 =42 %(Employee B salary is 42% is more than Employee A) Example 4: The price of Diesel is increased by 30%. By how much Diesel a car owner must reduce his consumption in order to maintain the same budget. Solution: Reduction in consumption of diesel: 30/100+30*100 = 300/13 %( Reduction in the consumption)
Posted on: Thu, 11 Sep 2014 12:27:56 +0000
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