39.45% is the change from 621 to 866
Calculation steps:
[( 866 - 621 ) ÷ 621] x 100 = 39.45%
Formula
Percentage change = [(866 - 621) / 621] x 100
Subtract the new number by the original number
866 - 621 = 245
245 ÷ 621 = 0.394524959742351
0.394524959742351 x 100 = 39.45%