31.93% is the change from 166 to 219
Calculation steps:
[( 219 - 166 ) ÷ 166] x 100 = 31.93%
Formula
Percentage change = [(219 - 166) / 166] x 100
Subtract the new number by the original number
219 - 166 = 53
53 ÷ 166 = 0.3192771084337349
0.3192771084337349 x 100 = 31.93%