-32.37% is the change from 621 to 420
Calculation steps:
[( 420 - 621 ) ÷ 621] x 100 = -32.37%
Formula
Percentage change = [(420 - 621) / 621] x 100
Subtract the new number by the original number
420 - 621 = -201
-201 ÷ 621 = -0.32367149758454106
-0.32367149758454106 x 100 = -32.37%