Question

what number when decreased by 20% becomes 100​

Answer 1

Answer:

hy mate here is ur answer...

Let x = the number

 

Translate:

  "When a number is decreased by 20% of itself, the result is 20"

              x                     -       (20/100)*x                 =       20

 

The math:

      x - (20/100)x = 20                           [re-write]

     (100/100)x - (20/100)x = 20           [get common denominator]

       (80/100)x = 20                        [this is 80% of x is 20]

          x = 25                               [multiply both sides by 5/4 or 100/80]

Step-by-step explanation:

hope helped dear plz mark me as brainalist........❣❣

Answer 2

Answer:

let the number be X

Step-by-step explanation:

then,

ATP,

x-20%=100

→x-20/100=100

→x-1/5=100

→5x-1/5=100

→5x-1=500

→5x=501

→x=501/5

→x=100.2