30.48% is the change from 620 to 809
Calculation steps:
[( 809 - 620 ) ÷ 620] x 100 = 30.48%
Formula
Percentage change = [(809 - 620) / 620] x 100
Subtract the new number by the original number
809 - 620 = 189
189 ÷ 620 = 0.30483870967741933
0.30483870967741933 x 100 = 30.48%