short Tricks

Percentage based Questions Question Type -1 If there is increase of X% and subsequently X% decrease then there is always loss / decrease in the condition. Trick: (X*X)/100 Ex . If Ruhan salary is increase by 50% and subsequently decrease by 50%. How much percentage loss? Ans. Use trick: 50x50/100= 25% decrease/loss Question Type -2 (Two Successive Discounts) What single discount is equivalent to two successive discounts of X% and Y% Trick: (X+Y)-{(X*Y)/100} Ex .What single discount is equivalent to two successive discounts of 10% and 20% ? Ans. Use trick: (10+20)-(10*20)/100= 28% Question Type -3 (Two Successive Increases) What single Increase is equivalent to two successive Increases of X% and Y% Trick: (X+Y)+{(X*Y)/100} Ex .What single Increase is equivalent to two successive Increases of 10% and 20% ? Ans. Use trick: (10+20)+(10*20)/100= 32%