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?
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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%.
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