Question

if a number is decreased by 25% and the decreased number once again decreased by 5%. what is the approximate percentage increase that should be affected to bring it back to the original number?​

Answer 1

Answer:

80 %

Step-by-step explanation:

let a number be A.

it is decreased by 25%=A x 25/100=A x1/4=A/4.

know this is again decreased by 5%

=A/4 x 5/100= A/4 x 1/20= A/80.

Now the percentage to again bring it back to a

= starting value of A/ the current value of A /100

= A/A/80x100=A x 80/A x 100= 80/100=80%.