20
20 = 1 x 20
100 = 5 x 20
To get the previous population you would have to multiply 9,300 by 38% (.38) and then add it to 9,300, or you can also multiply it by 138% (1.38) and still get the same answer but this step is only a one step the first is a two step process
I believe the equation would be
160+0.2y
Because 160 deer and you round the 20% into a decimal point.