-31.24% is the change from 621 to 427
Calculation steps:
[( 427 - 621 ) ÷ 621] x 100 = -31.24%
Formula
Percentage change = [(427 - 621) / 621] x 100
Subtract the new number by the original number
427 - 621 = -194
-194 ÷ 621 = -0.31239935587761675
-0.31239935587761675 x 100 = -31.24%