35.32% is the change from 620 to 839
Calculation steps:
[( 839 - 620 ) ÷ 620] x 100 = 35.32%
Formula
Percentage change = [(839 - 620) / 620] x 100
Subtract the new number by the original number
839 - 620 = 219
219 ÷ 620 = 0.3532258064516129
0.3532258064516129 x 100 = 35.32%