91.96% is the change from 311 to 597
Calculation steps:
[( 597 - 311 ) ÷ 311] x 100 = 91.96%
Formula
Percentage change = [(597 - 311) / 311] x 100
Subtract the new number by the original number
597 - 311 = 286
286 ÷ 311 = 0.9196141479099679
0.9196141479099679 x 100 = 91.96%