Formula for salary of a person is first increased by 20%, then it is decreased by 20%. Then the percentage change in his salary is
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let be no. is 100rs.,
increase=100+100*20/100
=100+20= 120rs.
decrease=120-100*20/100
=120-20=100rs.
changing = 100-100=0
change %=0/100*100= 0%
increase=100+100*20/100
=100+20= 120rs.
decrease=120-100*20/100
=120-20=100rs.
changing = 100-100=0
change %=0/100*100= 0%
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