68.31% is the change from 508 to 855
Calculation steps:
[( 855 - 508 ) ÷ 508] x 100 = 68.31%
Formula
Percentage change = [(855 - 508) / 508] x 100
Subtract the new number by the original number
855 - 508 = 347
347 ÷ 508 = 0.6830708661417323
0.6830708661417323 x 100 = 68.31%