39.49% is the change from 428 to 597
Calculation steps:
[( 597 - 428 ) ÷ 428] x 100 = 39.49%
Formula
Percentage change = [(597 - 428) / 428] x 100
Subtract the new number by the original number
597 - 428 = 169
169 ÷ 428 = 0.39485981308411217
0.39485981308411217 x 100 = 39.49%