90.06% is the change from 161 to 306
Calculation steps:
[( 306 - 161 ) ÷ 161] x 100 = 90.06%
Formula
Percentage change = [(306 - 161) / 161] x 100
Subtract the new number by the original number
306 - 161 = 145
145 ÷ 161 = 0.9006211180124224
0.9006211180124224 x 100 = 90.06%