a number is first decreased by 15% and then reduced by 15% by what percentage does the number change.
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Let the no. be 100
Since,it is decreased by 15%
New no.=100-15% of 100=85
Then,it is again decreased by 15%
So,new no.=85-15%of 85=85-12.75=72.25
Since,it is decreased by 100-72.25=27.75
So,decrease%=27.75/100×100%=27.75%
Hence,the no. is decreased by 27.75%
Since,it is decreased by 15%
New no.=100-15% of 100=85
Then,it is again decreased by 15%
So,new no.=85-15%of 85=85-12.75=72.25
Since,it is decreased by 100-72.25=27.75
So,decrease%=27.75/100×100%=27.75%
Hence,the no. is decreased by 27.75%
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