Question

a number is increased by 10% and the increased number is decreased by 10% show that the net decrease is 1%

Answer 1

Answer:see explanation

Step-by-step explanation:

Let the required no.be x.then

Increase in no.=X+x×10/100

=11x/10

By question,11x/10 is decreased by 10% . then

11x/10×90/100

=99x/100

Therefore net decrease in number

=x-99x/100

=X/100

Therefore net decreased%

=X/100×1/X

=1%