37.9% is the change from 620 to 855
Calculation steps:
[( 855 - 620 ) ÷ 620] x 100 = 37.9%
Formula
Percentage change = [(855 - 620) / 620] x 100
Subtract the new number by the original number
855 - 620 = 235
235 ÷ 620 = 0.3790322580645161
0.3790322580645161 x 100 = 37.9%