83.12% is the change from 231 to 423
Calculation steps:
[( 423 - 231 ) ÷ 231] x 100 = 83.12%
Formula
Percentage change = [(423 - 231) / 231] x 100
Subtract the new number by the original number
423 - 231 = 192
192 ÷ 231 = 0.8311688311688312
0.8311688311688312 x 100 = 83.12%