Question

A number is increased by 10% and then the increased number is decreased by 10% .find the net increase or decrease %

Answer 1

Let 1st no. be x
increase by 10%
x+x/10=11x/10
now decrease 10%
11x/10-(11x/10)/10=99x/100
the decrease is x-99x/100
x/100
decrease % is 1%