-93.24% is the change from 621 to 42
Calculation steps:
[( 42 - 621 ) ÷ 621] x 100 = -93.24%
Formula
Percentage change = [(42 - 621) / 621] x 100
Subtract the new number by the original number
42 - 621 = -579
-579 ÷ 621 = -0.9323671497584541
-0.9323671497584541 x 100 = -93.24%