Question

A certain single digit number is increased by 10. The obtained new number is increased by as much percent as orginal no increased in first instance. The final number obtained is 72. What is the initial single digit number?​

Answer 1

Answer:

Let the number be 100

when increased by 10% number will be

=100+

100

10

×100=110

when decreased by 10%

=110−

100

10

×110=99

Decrease in original value is (100-99)=1

Percentage decrease is

100

1

×100=1%

There will be 1 percent decrease