93.37% is the change from 166 to 321
Calculation steps:
[( 321 - 166 ) ÷ 166] x 100 = 93.37%
Formula
Percentage change = [(321 - 166) / 166] x 100
Subtract the new number by the original number
321 - 166 = 155
155 ÷ 166 = 0.9337349397590361
0.9337349397590361 x 100 = 93.37%