the sum of number when a number is increased by 10 % and decreased by 10 % is 100 what is the number ?
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let the number is 100
increase 10%=100+10=110
decrease of 10% on 110
=(10/100)×110=11
nett amount 110–11=99
So decrease 100–99=1
decrease of 1 out of 100
percentage of decrease 1%
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