Question

A number is first increased by 10%and decreased by 10%.then the number is

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%

Answer 2

for ex,100 is increased by 10/ then it is 110
and then 110 is decreased by 10/ is then 99