Question

if 80% of a number added to 80 give the result as the number itself then the number is

Answer 1

Let the number be x

According to the question

80%x+80=x

4x/5+80=x

80=x-4x/5

80=x/5

x=400

Answer 2

let number be X
80%of X+80=X
(80/100)X -X=-80
(-20/100)X=-80
X=(80×100)/20
X=400
hope you got it