34.52% is the change from 620 to 834
Calculation steps:
[( 834 - 620 ) ÷ 620] x 100 = 34.52%
Formula
Percentage change = [(834 - 620) / 620] x 100
Subtract the new number by the original number
834 - 620 = 214
214 ÷ 620 = 0.34516129032258064
0.34516129032258064 x 100 = 34.52%