34.94% is the change from 621 to 838
Calculation steps:
[( 838 - 621 ) ÷ 621] x 100 = 34.94%
Formula
Percentage change = [(838 - 621) / 621] x 100
Subtract the new number by the original number
838 - 621 = 217
217 ÷ 621 = 0.3494363929146538
0.3494363929146538 x 100 = 34.94%