Question

when a number is reduced by4 it becomes 80%of itself

Answer 1

let the no. be x
According to question
x-4=0.8x
on solving
0.2x=4
x=20

Answer 2

Let the number be x.

Given that the number is reduced by 4 = x - 4.

Given that number reduced by 4 becomes 80% of x

80x/100 = x - 4

4x/5 = x - 4

4x = 5x - 20

x = 20.

The number is 20.



Hope this helps!