Question

2. a number is decreased by 10% and then increased by 10%. The number so obtained is 10 less than the original number. What is the original number ?

Answer 1

Step-by-step explanation:

let the number be 100x

then

decreased by 10%,=90x

increased number=90x+9x=99x

A/Q

99x=100x-10

99x-100x=-10

-x=-10

x=10

then

the original number is =100*10=1000