81.39% is the change from 231 to 419
Calculation steps:
[( 419 - 231 ) ÷ 231] x 100 = 81.39%
Formula
Percentage change = [(419 - 231) / 231] x 100
Subtract the new number by the original number
419 - 231 = 188
188 ÷ 231 = 0.8138528138528138
0.8138528138528138 x 100 = 81.39%