a number when decreased by 20%gives 80 find number
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Let the number= x
Decreased by 20%=x - x × 20/100
=x -x/5
As per question,
x -x/5=80
=>(5x-x)/5=80
=>4x=80×5
=>4x=400
=>x=400/4
=>x=100 (Ans)
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