Question

The result of a number when increased by 20% is 161.find the number

Answer 1

Let the number be x ;

when increased by 20%
= x + (20/100)x

161 = x + (1/5)x
161 = (6/5)x
x = 805/6

x = 134.16

Answer 2

Let the number be x.

x + (20%)x     = 161
x + (20/100)x = 161
x + (1/5)x        =
5x + (1/5)x      =
      (6/5)x        =
          6x          = 161 x 5                (161 multiply by 5)
            x          =  805/6
            x          =   134.16