21.08% is the change from 166 to 201
Calculation steps:
[( 201 - 166 ) ÷ 166] x 100 = 21.08%
Formula
Percentage change = [(201 - 166) / 166] x 100
Subtract the new number by the original number
201 - 166 = 35
35 ÷ 166 = 0.21084337349397592
0.21084337349397592 x 100 = 21.08%