39.35% is the change from 620 to 864
Calculation steps:
[( 864 - 620 ) ÷ 620] x 100 = 39.35%
Formula
Percentage change = [(864 - 620) / 620] x 100
Subtract the new number by the original number
864 - 620 = 244
244 ÷ 620 = 0.3935483870967742
0.3935483870967742 x 100 = 39.35%