34.46% is the change from 621 to 835
Calculation steps:
[( 835 - 621 ) ÷ 621] x 100 = 34.46%
Formula
Percentage change = [(835 - 621) / 621] x 100
Subtract the new number by the original number
835 - 621 = 214
214 ÷ 621 = 0.3446054750402576
0.3446054750402576 x 100 = 34.46%