Question

The salary of an officer is increased by 25%.By what percent should the new salary be decreased to restore the original salary?

Answer 1

Suppose initially the salary of officer is S. now it is increased by 25% i.e. 25% of S = 0.25*S
so, now new salary S'=S=0.25 S=1.25S
Now to decrease it to the original salary, decrease in salary needed=1.25S-S=0.25 S
so, the decrease in salary in percentage i.e. % of S'(New salary)= 0.25S*100/1.25S=20%


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