Question

please solve that problem ​

Answer 1

let no be x

when no increased by 20% it becomes

120% of x = 1.2x

When no is decreased by 25%

it becomes 75% of x= 0.75 x

difference = 1.2 - 0.75)x = 36

0.45 x= 36

x= 36/0.45 = 80