-26.73% is the change from 621 to 455
Calculation steps:
[( 455 - 621 ) ÷ 621] x 100 = -26.73%
Formula
Percentage change = [(455 - 621) / 621] x 100
Subtract the new number by the original number
455 - 621 = -166
-166 ÷ 621 = -0.2673107890499195
-0.2673107890499195 x 100 = -26.73%