133.2% is the change from 256 to 597
Calculation steps:
[( 597 - 256 ) ÷ 256] x 100 = 133.2%
Formula
Percentage change = [(597 - 256) / 256] x 100
Subtract the new number by the original number
597 - 256 = 341
341 ÷ 256 = 1.33203125
1.33203125 x 100 = 133.2%