68.9% is the change from 508 to 858
Calculation steps:
[( 858 - 508 ) ÷ 508] x 100 = 68.9%
Formula
Percentage change = [(858 - 508) / 508] x 100
Subtract the new number by the original number
858 - 508 = 350
350 ÷ 508 = 0.6889763779527559
0.6889763779527559 x 100 = 68.9%